I received this today and thought some of you might want to know this.
This applies only to Mac users with OS 8.5 or 8.5.1.
From MacInTouch:

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Steve Jasik, an expert in Mac software debugging, found and fixed a "nasty bug
in Mac OS 8.5 and later systems:"

"The manifestation of the bug is random tromping of memory, and sometimes it
corrupts the heap (this happens when an Application is launched). The problem
is that some programmer did a Load Contents when he meant to do a Load
Address. The fix is as follows:

Make a copy of the system file, and open it in a resource editor. Open up the
'nlib', id = 11 resource (name = NQDResidentCursor )

Either do a Find Hex for the pattern '0844' or goto offset $1968 in the
resource.

You should see:  83A0 0844 7FC9 03A6

CHANGE IT TO:   3BA0 0844 7FC9 03A6

Save the file, play the appropriate games to replace the fixed System file
[for] the running System file, and re-boot."

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If you'd rather not make the changes yourself, you can download a patch
program that will do it for you at:
ftp://woodrow.ucs.indiana.edu/Public/Users/joe/MacOS85patch.sit.bin


Al Staffieri Jr.

AlStaff@...
http://members.aol.com/AlStaff/index.html