I had some trouble installing Adobe products (Illustrator CS, Photoshop CS, Acrobat 6). The installers (and the self-healing mechanism of Acobat) crashed after the authentication, but before displaying the EULA, giving the following error in the CrashReporter log (in /Library/Logs/CrashReporter/):
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000000
Thread 0 Crashed:
0 <<00000000>> 0x00000000 0 + 0
1 libRIP.A.dylib 0x91b86594 ripc_GetPattern + 0x880
2 libRIP.A.dylib 0x91b82fd0 ripc_GetColor + 0xdc
3 libRIP.A.dylib 0x91b84514 ripc_Render + 0xc0
4 libRIP.A.dylib 0x91b87a0c ripc_DrawRects + 0x21c
...
Apparently the problem was related to some fonts in the /Library/Fonts/ folder, even though no defective fonts were found in this folder (I checked with different tools). After removing all fonts from this folder, and after a reboot, I was able to install the software.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040128060839608