-Correction, in your Log folder, under Private/var/log/asl ; asl files are not associated with photoshop, they are Apple System Logs.
-I also have runaway (asl) files on my 10.5.8 Imac. Some are 80 gig +/-. and it fills my hard-drive. I got a program called Disk Inventory X that helped me graphically find these huge files. That way I can see them, right click on them and reveal them in a finder screen.
-After locating the offending files, if you right click the .asl file and say open with the utility "console" you can view the logs.
-Look for lines that repeat ludicrous times, then try to figure it out.
-I am no expert, but apparently I just found out my problem might be apple.launchd keeps trying to contact com.rim.BBLaunchAgent. I haven't owned a Blackberry for a few years now and already uninstalled their Desktop Manager, but some program remnant seems to be haunting my computer.
-If I determine the asl file(s) are unimportant, I delete them after entering my password. You have to then empty your trash to really free up hard-drive space.
-Good luck with your hunt.