qpixmap_x11 out of memory

[tsuraan]

Running knode and kmail (the only apps that I use that use Qt), I frequently get crashes after seeing the following types of messages:

knode: WARNING: KDE detected X Error: BadDrawable (invalid Pixmap or Window parameter) \x09
Major opcode: I
In file kernel/qpixmap_x11.cpp, line 627: Out of memory

The program will frequently recover after the BadDrawable errors, but the Out of memory error kills the application. I know that I'm not actually out of memory, and memtest86 shows that all my memory is fine. Only Qt apps crash like this, so I'm thinking that qt is somehow the culprit. Has anyone seen anything like this?

Running on an Acer Travelmate 736TLV (650 Mhz proc, 256 MB RAM, ATI Rage3d)

EDIT: My version for Qt is 3.2.3, and KDE is 3.1.5