diff --git a/THANKS b/THANKS
index a518bee..1ac326b 100644
--- a/THANKS
+++ b/THANKS
@@ -3,6 +3,7 @@ $Id$
 Derk-Jan Hartman <thedj@users.sourceforge.net> - Gentoo ebuild file
 Gildas Bazin <gbazin@netcourrier.com> - win32 driver improvements
 Jan Hubicka <hubicka@freesoft.cz> - aafire
+Ladislav Hagara <hgr@vabo.cz> - Source Mage spell
 Michele Bini <mibin@tin.it> - original SDL plasma
 Philip Balinov - Slackware package
 Richard Zidlicky <rz@linux-m68k.org> - rpm specfile
diff --git a/src/event.c b/src/event.c
index 0d33643..c47e3df 100644
--- a/src/event.c
+++ b/src/event.c
@@ -278,7 +278,7 @@ static unsigned int _lowlevel_event(void)
                 h = (xevent.xconfigure.height + x11_font_height / 3)
                       / x11_font_height;
 
-                if(w == _caca_width && h == _caca_height)
+                if(!w || !h || (w == _caca_width && h == _caca_height))
                     continue;
 
                 x11_new_width = w;
@@ -370,6 +370,7 @@ static unsigned int _lowlevel_event(void)
         if(_caca_resize_event)
         {
             _caca_resize_event = 0;
+            _caca_resize = 1;
             return CACA_EVENT_RESIZE;
         }
 
@@ -553,6 +554,7 @@ static unsigned int _lowlevel_event(void)
         if(_caca_resize_event)
         {
             _caca_resize_event = 0;
+            _caca_resize = 1;
             return CACA_EVENT_RESIZE;
         }
 
@@ -723,7 +725,7 @@ static unsigned int _lowlevel_event(void)
 #if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
 static void _push_event(unsigned int event)
 {
-    if(events == EVENTBUF_LEN)
+    if(!event || events == EVENTBUF_LEN)
         return;
     eventbuf[events] = event;
     events++;
diff --git a/src/graphics.c b/src/graphics.c
index b50b9f7..9c63575 100644
--- a/src/graphics.c
+++ b/src/graphics.c
@@ -443,9 +443,9 @@ void caca_putstr(int x, int y, char const *s)
 
     if(x < 0)
     {
-        len -= -x;
-        if(len < 0)
+        if(len < (unsigned int)-x)
             return;
+        len -= -x;
         s += -x;
         x = 0;
     }