ITunes application quits unexpectedly in OS 10.2.8

Question

Computer wizard and sage: It's getting monotonous. Every time I try to play 6.0.5 iTunes on my OS 10.2.8 system (with a G4), iTunes shuts itself off after a few seconds and a message pops up -- "the iTunes application has quit unexpectedly."
Any ideas on how to fix this besides simply boosting buying more RAM or freeing up hard disc space (have deleted a bunch of stuff to make 1 GB available now) and upgrading the operating system?
Other data: I was also getting the same application quit message for Abode Reaer when trying to open PDFs. Attempted a "permissions" repair run in disk utility -- not sure I did it right.
I sure will appreciate your ideas and prescriptions. Thanks for the help.
Paul in Chicagoland
G4   Mac OS X (10.2.x)  

Answer 1

Problem fixed. No, it was not a space issue. Yes, freeing up space is important.
But here was the glitch. It was a "ad.doubclick.net" file that was stuck in my podcast folder. I finally realized this when I saw this title appear briefly on the song title bar on the top of iTunes before iTunes aburptly went bye-bye. iTunes apparently was defaulting to this file when I did not click any specific tune to play.
I deleted that file and presto! iTunes back in business.
Thanks, folks, for your attention to this matter. Your suggestions while not hitting this specific hangnail on the head are good ones and duly noted by me.
Paul