Some time ago, probably coincident with an upgrade or reinstall, my
squirrelmail installation developed the nasty habit of supplying blank
windows whenever it should have redirected me to my INBOX. This was only
mildly irritating, so I put up with it for some number of months.
Finally, I got irritated enough to diagnose the problem. (Learned a lot
about php along the way. :v) It turns out that somehow, my configuration
file had become corrupted; at least enough so that it lost its trailing
?>. Without it, PHP became convinced that it should emit its headers,
and after that, the header('Location: ...') commands stopped working.
(Frustratingly, they did so silently. PHP should make a note of the file
and line that first generated output, forcing the headers; then, if a
header() command is encountered after that, log an error indicating the
conflict.)
So, the moral of the story, which I'm writing here because the answer
wasn't in the mailing list logs when I looked, is this: if you get funny
behavior, try moving your config.php file out of the way and re-running
conf.pl to generate a fresh one.
By the way: I've been using squirrelmail for over a year now, and I'm
*very* thankful that you all wrote it. Huge kudos!
--Jon
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