Every font comes out jagged in Photoshop even though the same font(s) are perfectly sharp in Illustrator and Quark.

I was having font problems in Quark (program shutting down because of font conflicts) and even though I turned off the problem fonts the program kept crashing and the people at Quark told me to delete the font cache files. I am not sure if the problem came before or after this. But the fact that Adobe Illustrator can find the fonts and Photoshop can only display the bitmap is a problem.

I am using an iMac G5 with 1.5 GB of RAM. I am using Adobe PhotoShop CS v.8.