more strange behavior - some scripts forgotten

[Byron Turner]

Almost every object whose script I open asks to apply changes when I go 
to close, whether or not there is any script in it or any changes have 
been made.  Should I be worried?

Scripts that I fixed long ago, seem to be reverting back to earlier 
versions.  Example I have a script where I created a global and another 
object script uses that global.  When I looked just now, the first 
object had no reference to that global or any of the  succeeding 
script, but the second object retained it.  I opened a previous version 
and found the first object's script.

I've also noted that in my longest script characters take a very long 
time to show up . . as much as several seconds after I begin typing.

Obviously, I'm very concerned.  Any theories?  Any suggestions on how 
to proceed?

Mac OSX
Dual 2.5 G5
6.5 Gig RAM

PowerBook
1 GHz
500 MB RAM

Same problems on both machines as far as I can tell.