diff --git a/app/scodoc/TrivialFormulator.py b/app/scodoc/TrivialFormulator.py
index df31c1d2..bb9bb7f2 100644
--- a/app/scodoc/TrivialFormulator.py
+++ b/app/scodoc/TrivialFormulator.py
@@ -701,8 +701,17 @@ var {field}_as = new bsn.AutoSuggest('{field}', {field}_opts);
                 labels = descr.get(
                     "labels", descr.get("allowed_values", ["oui", "non"])
                 )
-                R.append(labels[int(self.values[field])])
-                if int(self.values[field]):
+                _val = self.values[field]
+                if isinstance(_val, bool):
+                    bool_val = 1 if _val else 0
+                elif _val == "False":
+                    bool_val = 0
+                elif _val:
+                    bool_val = 1
+                else:
+                    bool_val = 0
+                R.append(labels[bool_val])
+                if bool_val:
                     R.append('<input type="hidden" name="%s" value="1"/>' % field)
             else:
                 labels = descr.get("labels", descr["allowed_values"])
diff --git a/app/scodoc/sco_formsemestre_edit.py b/app/scodoc/sco_formsemestre_edit.py
index 50d96415..08b1f9a7 100644
--- a/app/scodoc/sco_formsemestre_edit.py
+++ b/app/scodoc/sco_formsemestre_edit.py
@@ -1600,9 +1600,9 @@ def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=
             cnx, args={"formsemestre_id": formsemestre_id, "ue_id": ue["ue_id"]}
         )
         if coefs:
-            initvalues["ue_" + ue["ue_id"]] = coefs[0]["coefficient"]
+            initvalues["ue_" + str(ue["ue_id"])] = coefs[0]["coefficient"]
         else:
-            initvalues["ue_" + ue["ue_id"]] = "auto"
+            initvalues["ue_" + str(ue["ue_id"])] = "auto"
         descr = {
             "size": 10,
             "title": ue["acronyme"],
@@ -1610,7 +1610,7 @@ def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=
         }
         if ue["ue_id"] == err_ue_id:
             descr["dom_id"] = "erroneous_ue"
-        form.append(("ue_" + ue["ue_id"], descr))
+        form.append(("ue_" + str(ue["ue_id"]), descr))
 
     tf = TrivialFormulator(
         REQUEST.URL0,
@@ -1632,7 +1632,7 @@ def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=
         ue_modified = []
         msg = []
         for ue in ues:
-            val = tf[2]["ue_" + ue["ue_id"]]
+            val = tf[2]["ue_" + str(ue["ue_id"])]
             coefs = sco_formsemestre.formsemestre_uecoef_list(
                 cnx, args={"formsemestre_id": formsemestre_id, "ue_id": ue["ue_id"]}
             )
diff --git a/app/scodoc/sco_formsemestre_exterieurs.py b/app/scodoc/sco_formsemestre_exterieurs.py
index a46ce805..ca8b4370 100644
--- a/app/scodoc/sco_formsemestre_exterieurs.py
+++ b/app/scodoc/sco_formsemestre_exterieurs.py
@@ -229,7 +229,8 @@ def formsemestre_ext_edit_ue_validations(
     descr = _ue_form_description(context, ue_list, REQUEST.form)
     if REQUEST and REQUEST.method == "GET":
         initvalues = {
-            "note_" + ue["ue_id"]: ue["validation"].get("moy_ue", "") for ue in ue_list
+            "note_" + str(ue["ue_id"]): ue["validation"].get("moy_ue", "")
+            for ue in ue_list
         }
     else:
         initvalues = {}
@@ -326,11 +327,11 @@ def _ue_form_description(context, ue_list, values):
     for ue in ue_list:
         # Menu pour code validation UE:
         # Ne propose que ADM, CMP et "Non inscrit"
-        select_name = "valid_" + ue["ue_id"]
+        select_name = "valid_" + str(ue["ue_id"])
         menu_code_UE = """<select class="ueext_valid_select" name="%s">""" % (
             select_name,
         )
-        cur_value = values.get("valid_" + ue["ue_id"], False)
+        cur_value = values.get("valid_" + str(ue["ue_id"]), False)
         for code in _UE_VALID_CODES:
             if cur_value is False:  # pas dans le form, cherche en base
                 cur_value = ue["validation"].get("code", None)
@@ -348,7 +349,7 @@ def _ue_form_description(context, ue_list, values):
             else:
                 disabled = ""
         menu_code_UE += "</select>"
-        cur_value = values.get("coef_" + ue["ue_id"], False)
+        cur_value = values.get("coef_" + str(ue["ue_id"]), False)
         if cur_value is False:  # pas dans le form, cherche en base
             cur_value = ue["uecoef"].get("coefficient", "")
         itemtemplate = (
@@ -389,15 +390,15 @@ def _check_values(context, ue_list, values):
     """
     for ue in ue_list:
         pu = " pour UE %s" % ue["acronyme"]
-        code = values.get("valid_" + ue["ue_id"], False)
+        code = values.get("valid_" + str(ue["ue_id"]), False)
         if code == "None":
             code = None
-        note = values.get("note_" + ue["ue_id"], False)
+        note = values.get("note_" + str(ue["ue_id"]), False)
         try:
             note = _convert_field_to_float(note)
         except ValueError:
             return False, "note invalide" + pu
-        coef = values.get("coef_" + ue["ue_id"], False)
+        coef = values.get("coef_" + str(ue["ue_id"]), False)
         try:
             coef = _convert_field_to_float(coef)
         except ValueError:
@@ -472,12 +473,12 @@ def _record_ue_validations_and_coefs(
     context, formsemestre_id, etudid, ue_list, values, REQUEST=None
 ):
     for ue in ue_list:
-        code = values.get("valid_" + ue["ue_id"], False)
+        code = values.get("valid_" + str(ue["ue_id"]), False)
         if code == "None":
             code = None
-        note = values.get("note_" + ue["ue_id"], False)
+        note = values.get("note_" + str(ue["ue_id"]), False)
         note = _convert_field_to_float(note)
-        coef = values.get("coef_" + ue["ue_id"], False)
+        coef = values.get("coef_" + str(ue["ue_id"]), False)
         coef = _convert_field_to_float(coef)
         if coef == "" or coef == False:
             coef = None
diff --git a/app/scodoc/sco_preferences.py b/app/scodoc/sco_preferences.py
index e713e601..bf87dac0 100644
--- a/app/scodoc/sco_preferences.py
+++ b/app/scodoc/sco_preferences.py
@@ -1424,7 +1424,7 @@ class BasePreferences(object):
                 {
                     "initvalue": None,
                     "title": "Bulletins PDF: largeur col. modules",
-                    "explanation": "en cm (vide si auto)",
+                    "explanation": "en cm (vide ou 0 si auto)",
                     "type": "float",
                     "category": "bul",
                 },
@@ -1816,10 +1816,18 @@ class BasePreferences(object):
                     and self.prefs_dict[p["name"]].get("input_type", None)
                     == "boolcheckbox"
                 ):
+                    # boolcheckbox: la valeur stockée en base est une chaine "0" ou "1"
+                    # que l'on ressort en True|False
                     if p["value"]:
-                        p["value"] = int(p["value"])  # boolcheckboxes are always 0/1
+                        try:
+                            p["value"] = bool(int(p["value"]))
+                        except ValueError:
+                            log(
+                                f"""Warning: invalid value for boolean pref in db: '{p["value"]}'"""
+                            )
+                            p["value"] = False
                     else:
-                        p["value"] = 0  # NULL (backward compat)
+                        p["value"] = False  # NULL (backward compat)
                 self.prefs[p["formsemestre_id"]][p["name"]] = p["value"]
 
             # add defaults for missing prefs
@@ -1885,6 +1893,9 @@ class BasePreferences(object):
                 names = [name]
             for name in names:
                 value = self.get(formsemestre_id, name)
+                if self.prefs_dict[name].get("input_type", None) == "boolcheckbox":
+                    # repasse les booleens en chaines "0":"1"
+                    value = "1" if value else "0"
                 # existe deja ?
                 pdb = self._editor.list(
                     cnx, args={"formsemestre_id": formsemestre_id, "name": name}
@@ -2187,7 +2198,7 @@ function set_global_pref(el, pref_name) {
                 return flask.redirect(dest_url + "&head_message=Préférences modifiées")
             elif destination == "again":
                 return flask.redirect(
-                    REQUEST.URL0 + "?formsemestre_id=" + self.formsemestre_id
+                    REQUEST.URL0 + "?formsemestre_id=" + str(self.formsemestre_id)
                 )
             elif destination == "global":
                 return flask.redirect(scu.ScoURL() + "/edit_preferences")
diff --git a/app/views/notes.py b/app/views/notes.py
index b8381092..a0d11493 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -313,6 +313,12 @@ sco_publish(
     sco_edit_ue.edit_ue_set_code_apogee,
     Permission.ScoChangeFormation,
 )
+sco_publish(
+    "/formsemestre_edit_uecoefs",
+    sco_formsemestre_edit.formsemestre_edit_uecoefs,
+    Permission.ScoView,
+    methods=["GET", "POST"],
+)
 sco_publish(
     "/formation_table_recap", sco_edit_ue.formation_table_recap, Permission.ScoView
 )
diff --git a/app/views/scolar.py b/app/views/scolar.py
index 725573ee..b5ec950e 100644
--- a/app/views/scolar.py
+++ b/app/views/scolar.py
@@ -2077,10 +2077,5 @@ sco_publish(
 )
 
 #
-sco_publish(
-    "/formsemestre_edit_uecoefs",
-    sco_formsemestre_edit.formsemestre_edit_uecoefs,
-    Permission.ScoView,
-)
 
 context.populate(globals())