Thanks @joekgbx !
I selected the text I originally quoted and hit the "Reply button, and this is what I did. I cancelled it several times, but it kept doing the same thing. I looked, but the general “Reply” button at the bottom of the thread was missing (just Bookmark, Share, and Flag). The whole system was being really gllitchy though - kept getting 502 errors from the editor window when the “Saving…” alert timed out even after my post was obviously up. (That also meant that the edit option wasn’t appearing straight away). I think this all might be connected to the occasional “503 No server available” errors as well. Is it possible that there’s a resource issue (not enough memory/disk space, not enough servers, gateway bottleneck, DDoS…) for the forums?
Edit: Aaaand I’m back, after about 30 minutes of no response from the forums server while still being able to access the main gearboxsoftware.com site. Something is definitely amiss, but I’m pretty sure I didn’t phase-shift an entire city…