I recently bought a second-hand G4 running OSX. It came with a strange bug.
I first noticed the problem in email. The second line of every header was unreadable. This was because the usual font had been replaced by an unfamiliar and unreadable graphics font. Sometimes the message text was corrupted in the same way.
The problem turned up in other applications as well. Certain websites are totally unreadable. Some Word files had portions of the text translated into this useless font.
I selected some of this garbage text in Word and changed the font. Suddenly it was transformed into normal English. I entered some text into a sticky note. It looked just fine. I made it bold and it changed into the graphics font.
Help!
MacOSX,com rules! I was simply amazed at the speed of your response.
Now here's what happened. I downloaded Yasu, FontExplorer and Onyx. I deleted the caches with Yasu. It didn't fix the problem. For good measure, I deleted the caches again using both Onyx and FontExplorer. No joy.
Then I tried something from FontExplorer's Tools menu called "Clean Systems Fonts folders...". Instant success! Amazing! This problem has been driving me nuts for weeks. Thanks a million you guys. I wasn't looking forward to step 3 I can tell you!
Glad it worked out without too much effort. Have a safe and happy Holiday!