Apologies. I should know better. Here:
Support Request Template
What version of phpBB are you using?
What is your board's URL? http://forums.searchtempest.com
Who do you host your board with?
How did you install your board?
I used the download package from phpBB.com
Is your board a fresh install or a conversion?
Update from a previous version of phpBB3
Do you have any MODs installed?
Is registration required to reproduce this issue?
What version of phpBB3 did you update from?
What styles do you currently have installed?
What language(s) is your board currently using?
Which database type/version are you using?
What is your level of experience?
Experienced with PHP, new with phpBB
When did your problem begin?
About two days ago, after upgrading from 3.0.5 to 3.0.9.
Please describe your problem.
I upgraded the files, then ran the DB upgrade script. Unfortunately I can't recall with certainty whether the DB update gave any errors, but it's certainly shown as completed now.
I then attempted to remove the Anti Bot Question mod through the AutoMod interface. (I now understand that I should have done that first.) It threw an error, which I assumed was due to files changed with the update to 3.0.9. So I simple 'forced' the uninstall.
At that point everything appeared to be working correctly and updated to 3.0.9. Board was accessible, could be posted to, etc.
However, each of the two days since then, several old topics have been spontaneously bumped. The last modified time of the last post in the topic and of the topic itself are spontaneously updated to the current time. The first time I assumed it was a one-off problem and just fixed the modified times through the database, but it keeps happening.
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I don't have any mods installed, and the majority of my styling is generic, so if the easiest fix involves importing forum contents and users into a new installation, that wouldn't be a giant hardship. Of course if there's an easier solution, even better. Thanks!