Okay, I completely uninstalled Vue 7 and reinstalled it, but the menu problem remains. Any Vue 7 xStream menu that involves a pop-up window--Objects, Materials, Atmospheres--causes an immediate Out of Memory error and crashes the app.

I've run two OpenGL benchmark programs--FurMark_v1.6.5 and OpenGL Extensions Viewer 3.0--and both report my OpenGL graphics card as performing fine.

I'm beginning to think that it may be a corrupted XP DLL somewhere.

Thanks everybody for your feedback.