diff --git a/inc/DAVResource.php b/inc/DAVResource.php
index 269e328d..aa84eb1c 100644
--- a/inc/DAVResource.php
+++ b/inc/DAVResource.php
@@ -665,7 +665,7 @@ EOQRY;
       dbg_error_log( 'ERROR', "Error occurred in:\n%s\n",$xml);
       if ($errno >= 200 && $errno < 300 && count($xml_tags) >= 3) {
           // XML namespace error, but parsing was probably fine: continue and return tags (cf. #9)
-          dbg_error_log( 'ERROR', 'XML namspace error but tags extracted, trying to continue');
+          dbg_error_log( 'ERROR', 'XML namespace error but tags extracted, trying to continue');
       } else {
           return $raw_string;
       }
diff --git a/inc/WritableCollection.php b/inc/WritableCollection.php
index ffe52ca3..d190d975 100644
--- a/inc/WritableCollection.php
+++ b/inc/WritableCollection.php
@@ -298,6 +298,7 @@ EOSQL;
       return $this->WriteCalendarMember($resource,$create_resource,true,$segment_name,$log_action);
     }
     else if ( $resource instanceof VCard )
+      trace_bug( "Calling undefined function WriteAddressbookMember!? Please report this to the davical project: davical-general@lists.sourceforge.net" );
       return $this->WriteAddressbookMember($resource,$create_resource,$segment_name, $log_action);
 
     return $segment_name;