Font Size 0

I have Adobe Photoshop 8 CS which I've used many times before without a problem. Recently I re-installed Windows XP (which I've also done many times before) and I noticed after re-installing Photoshop I cannot add text to images.

Whenever I try, I am able to select the area where I want to add text but the cursor doesn't appear and the font size is set at 0.01. I try to set the font size higher and it continuously drops back to zero. Oddly though, I am able to add text to images in Image Ready without a problem.

I've tried re-installing Photoshop again, cleaning the registry and temp files between installs and I get nowhere. I've never experienced this problem before and I'm usually the one giving help advice as opposed to getting it but here I seem to have no choice except to swallow my pride and ask. Would it be an issue with the font settings somewhere in Windows or has something perhaps messed up my registry?

Any help would be greatly appreciated.

Hve you trie scrapping your preferences file?
Hold down Alt, Ctrl, and Shift keys (Mac: Command, Option, Shift) while starting Photoshop. A dialog box will appear asking if you wish to delete the preferences file.