I'm having a problem with my shader causing my texture to render transparent. As you can see in the top 2 windows, the text is rendered correctly when I just use the image data. However, in the bottom half, the text is not rendered at all when I try to multiply a color. No shader errors at all.

gDebugger also shows that your transformMatrix is full of zeros. Does that have something to do with your problem?

Interesting...I didn't notice that! The issue was I was assigning my other two uniforms BEFORE calling glUseProgram. So "color" was conflicting with the handle of "transform matrix." Thanks for your help.