You’re welcome.
I wonder whether this could be a font issue. Take a look at the following article:
Font Management in Mac OS X Tiger and Panther
Font Book (included with Mac OS X) can be used to validate fonts and resolve duplicates.
Get rid of Helvetica Fractions and Times Phonetic if you have any of those fonts installed.
A simple troubleshooting procedure for this kind of problems is to start up in
Safe Mode -- see
Undoing Font Book.
Read the following article for general troubleshooting and cache-cleaning procedures:
Resolving Disk, Permission, and Cache Corruption
In particular, be sure to verify/repair the startup disk (not just permissions), and to read this as well:
Side effects of System cache cleaning
In addition to the cache-cleaning utilities mentioned there, you may also consider
OnyX or
Cache Out X, which are free, although for this particular problem
Font Finagler is probably the most appropriate.