One of the testers on my 6.5.1 test board managed to find something broke . . . except that I cannot determine what/how it's broken. They have one PM they received from another tester, that when they try to reply to it, messhandler.php simply gives them a "We Cannot Proceed" page.
I've become that user and tried it, and got the same result. They can properly PM to all their other PMs, and all of my PMs work fine and I can reply to them all without issue.
Thinking that one of the PM mods I installed - or something I goofed while installing them - might be the culprit (Browsable PMs and Quoting original messages on PMs) I reverted to all clean "out of the .zip" code for messhandler.php & tmpl, messreply.php & tmpl, and viewmessage.php and tmpl. Absolutely no change in results, the same "We Cannot Proceed" page happens. I've browsed the Messages table in phpMyAdmin, and as far as I can tell, it LOOKS ok as far as structure goes.
Any thoughts or insight on this?
