Posted by jwlum on 03/22/06 18:28

Good info, though it doesn't seem to shed any light on why Internet
Explorer seems to exhibit different caching behavior depending on
whether or not a window was spawned via window.open prior to form
submission.

I am not using sessions at the PHP level and would rather not introduce
that across my code base just for this, so the session-related material
probably isn't an answer for me.

The solution I am going to pursue is to manually write out a
"Last-Modified" HTTP header with the last-modified time of the script
itself. This definitely works around the apparent IE bug that I
described above, but it may cause me other grief that I haven't
discovered yet.

Thanks for all the advice,
John

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