 <p>This is not going to be fun to debug. i suggest a google search like this one to maybe find an exsiting bug report dealing with this:</p> <p><a href="http://www.google.com/search?rlz=1C1ASUT_enUS401US401&amp;sourceid=chrome&amp;ie=UTF-8&amp;q=glTexSubImage2D1+core+dump#sclient=psy&amp;hl=en&amp;rlz=1C1ASUT_enUS401US401&amp;source=hp&amp;q=glTexSubImage2D+core+dump&amp;aq=f&amp;aqi=&amp;aql=&amp;oq=&amp;pbx=1&amp;fp=f478bdfafcb0c911" rel="nofollow">http://www.google.com/search?rlz=1C1ASUT_enUS401US401&amp;sourceid=chrome&amp;ie=UTF-8&amp;q=glTexSubImage2D1+core+dump#sclient=psy&amp;hl=en&amp;rlz=1C1ASUT_enUS401US401&amp;source=hp&amp;q=glTexSubImage2D+core+dump&amp;aq=f&amp;aqi=&amp;aql=&amp;oq=&amp;pbx=1&amp;fp=f478bdfafcb0c911</a></p>