This solved a problem on a factory install of Panther on a new dual G5. Help worked fine at first, but started chewing up massive amounts of cpu before giving a message that it couldn't find any thing in <my home directory>. I tried trashing prefs, which didn't work, then decided I better check MOSH. Trashing the Help caches fixed it right up.

This problem apparently isn't isolated to upgrade installs. Since trashing cache files is probably completely harmless, I'd recommend trying this first. It worked for me.

Dan

The above solution worked for me on 10.2.8, that is, removing the Help Cache, when the Help Viewer refused to retrieve a question. Being new to OSX (and a computer idiot) it was great to find a solution to this first real problem here so big thanks to this site and the people who are generous enough to advise beginners. After that long ramble could you please tell me what MOSH is? Thanks.