Problem texturing with new nvidia drivers

I have a bitmap with all the ascii chars for drawing text in a CAD program im working on.
For using this bitmap i use:

glBindTexture (GL_TEXTURE_2D, n);

After that I index this texture using glTexCoord2f(…); for every char.

This worked until we updated the NVIDIA drivers from 3.x to 4.x.
Are there any known problems of nvidia last drivers? Can it be a bug of our code?

I have also tried to use glTexImage2d(…) for initializing the texture, but it doesn’t sseems to work properly, either.

>>Can it be a bug of our code?<<
Difficult to tell wíthout details.
What’s happening instead?
Does texturing work at all?
Did you check the GL_RENDERER?
Filter modes, clamping, drawing routine, OS, board, …?