[calumr]

After reading some replies in this thread, I was wondering what might be wrong with:
<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4d(<font color = blue>0.0</font>,<font color = blue>0.0</font>,<font color = blue>0.0</font>,(<font color = blue>1.0</font>/<font color = blue>10.0</font>));
glRectd(<font color = blue>-1</font>,-<font color = blue>1</font>,sys_glWidth+<font color = blue>1</font>,sys_glHeight+<font color = blue>1</font>);</font>[/code]
It works on some machines, but not others. GL_BLEND is enabled. Checking sys_glWidth and sys_glHeight are all I can think of - but are there any other possibilities?