Double posts -- lots of them, recently. Why?
Problem: Just in the past 2-3 months or so, I've been experiencing a good number of duplicate posts getting created ... from my own posting. (Not referring to other dupes by other folks.) Has probably happened ten times, perhaps a couple more.
Symptoms: On-screen, I'll be finishing up a new post by clicking the <submit> button. The whirling timer will spin for an inordinate amount of time (30-40secs or more), then up will pop a dialog box asking to "Leave page" or "Stay on page." I'll pick one of them, and have tried the other ... different choices on different occasions, but all have the same effect. At which point, after choosing, when the screen then shows the last post in the thread, I find that two of the posts got posted. I'm not double-clicking or anything else obviously wrong, other than responding to that strange leave/stay dialog box when it appears. When it does happen, I simply delete the second, spurious one. But the problem remains: double posting for no apparent reason.
My system: No new changes, over past 6mos. Same software, versions, plug-ins and everything else as existed 6mos ago. No software changes on this end, other than the standard occasional Windows security patches/updates that come along. Now and then, I've cleared the cookies. I generally completely logout from the forum, coming back later with a freshly-launched browser. And my browser is set to automatically clear out the session-based crud each time I close the browser. About as clean as I can make it, from this end.
Strange. I can't ever recall similar double-post behavior before a few months ago.
Uncertain whether anyone else has been experiencing this exact dialog/double posting recently.
FYI, in case there is something wonky with the vB forum software, a setting, or some other step that I need to perform on my end.