diff --git a/app/scodoc/sco_abs.py b/app/scodoc/sco_abs.py
index 567a1c403..323a1e1d8 100644
--- a/app/scodoc/sco_abs.py
+++ b/app/scodoc/sco_abs.py
@@ -955,7 +955,7 @@ def MonthTableBody(
                 % (bgcolor, weekclass, attrs, d, day)
             )
             cc = []
-            for morning in (1, 0):
+            for morning in (True, False):
                 color = None
                 legend = ""
                 href = ""
diff --git a/app/scodoc/sco_abs_views.py b/app/scodoc/sco_abs_views.py
index aa36e3fc4..9088a0efe 100644
--- a/app/scodoc/sco_abs_views.py
+++ b/app/scodoc/sco_abs_views.py
@@ -74,7 +74,8 @@ def doSignaleAbsence(
     """
     etud = sco_etud.get_etud_info(filled=1, etudid=etudid, REQUEST=REQUEST)[0]
     etudid = etud["etudid"]
-
+    if not moduleimpl_id:
+        moduleimpl_id = None
     description_abs = description
     dates = sco_abs.DateRangeISO(context, datedebut, datefin)
     nbadded = 0
@@ -186,7 +187,7 @@ def SignaleAbsenceEtud(context, REQUEST=None):  # etudid implied
             menu_module = """
             <script type="text/javascript">
             function form_enable_disable() {
-                if ( $("select#sel_moduleimpl_id").val() == "NULL" ) { 
+                if ( $("select#sel_moduleimpl_id").val() == "" ) { 
                     $("#butsubmit").prop("disabled", true); 
                 } else { 
                     $("#butsubmit").prop("disabled", false); 
@@ -203,7 +204,7 @@ def SignaleAbsenceEtud(context, REQUEST=None):  # etudid implied
             menu_module = (
                 """<p>Module: <select id="sel_moduleimpl_id" name="moduleimpl_id">"""
             )
-        menu_module += """<option value="NULL" selected>(Module)</option>"""
+        menu_module += """<option value="" selected>(Module)</option>"""
 
         for ue in ues:
             modimpls = nt.get_modimpls(ue_id=ue["ue_id"])
@@ -725,10 +726,10 @@ def CalAbs(context, etudid, sco_year=None):
     """Calendrier des absences d'un etudiant"""
     # crude portage from 1999 DTML
     REQUEST = None  # XXX
-    etud = sco_etud.get_etud_info(filled=1, REQUEST=REQUEST)[0]
+    etud = sco_etud.get_etud_info(filled=1, etudid=etudid, REQUEST=REQUEST)[0]
     etudid = etud["etudid"]
     anneescolaire = int(scu.AnneeScolaire(sco_year))
-    datedebut = str(anneescolaire) + "-08-31"
+    datedebut = str(anneescolaire) + "-08-01"
     datefin = str(anneescolaire + 1) + "-07-31"
     nbabs = sco_abs.count_abs(etudid=etudid, debut=datedebut, fin=datefin)
     nbabsjust = sco_abs.count_abs_just(etudid=etudid, debut=datedebut, fin=datefin)
@@ -815,7 +816,7 @@ def ListeAbsEtud(
         sco_year: année scolaire à utiliser. Si non spécifier, utilie l'année en cours. e.g. "2005"
     """
     absjust_only = int(absjust_only)  # si vrai, table absjust seule (export xls ou pdf)
-    datedebut = "%s-08-31" % scu.AnneeScolaire(sco_year=sco_year)
+    datedebut = "%s-08-01" % scu.AnneeScolaire(sco_year=sco_year)
 
     etud = sco_etud.get_etud_info(etudid=etudid, filled=True)[0]
 
@@ -915,7 +916,9 @@ def _TablesAbsEtud(
     absjust_only=0,
     REQUEST=None,
 ):
-    """Tables des absences justifiees et non justifiees d'un étudiant sur l'année en cours"""
+    """Tables des absences justifiees et non justifiees d'un étudiant
+    sur l'année en cours
+    """
     absjust = sco_abs.list_abs_just(etudid=etudid, datedebut=datedebut)
     absnonjust = sco_abs.list_abs_non_just(etudid=etudid, datedebut=datedebut)
     # examens ces jours là ?
diff --git a/app/scodoc/sco_formsemestre_status.py b/app/scodoc/sco_formsemestre_status.py
index 651ea515e..f0ff8127a 100644
--- a/app/scodoc/sco_formsemestre_status.py
+++ b/app/scodoc/sco_formsemestre_status.py
@@ -467,7 +467,7 @@ def retreive_formsemestre_from_request():
     group_ids = args.get("group_ids", [])
     if "formsemestre_id" in args:
         formsemestre_id = args["formsemestre_id"]
-    elif "moduleimpl_id" in args:
+    elif "moduleimpl_id" in args and args["moduleimpl_id"]:
         modimpl = sco_moduleimpl.do_moduleimpl_list(
             context, moduleimpl_id=args["moduleimpl_id"]
         )