Problem with System 7.5?

[osiris@cs.utexas.edu (Rob Browning)]

I was playing with a copy of MCL on a machine with system 7.5 installed,
and I noticed what may be a problem:

If I evaluate any buffer or load any fasl file, saving a window with
modifications will no longer remove the dagger next to the name and reset
the window to clean, but it does appear to save the contents to disk.  This
means that the only way to close the window is to say no when it asks if I
want to save the changes.

Is this a known problem, or should I look elsewhere for the cause?
Are there other problems with 7.5?

--Thanks.