Login redirects to home page?

I had assumed that it was a lingering side effect of whatever broke the game recently, but I have been unable to log in as any attempt merely redirected back to the main page. Apparently, though, others have been able to log in successfully for days (side note: a "recent news" sidebar on the main page would help a lot with confusion is these sorts of circumstances), so I'm concerned that either something is being cached somewhere (although I've tried on multiple computers, so it would have to be something upstream), there is some sort of server bug, or I was mistakenly lumped in with whoever you thought broke the server and my IP is somehow blocked. (As a side note, I just realized that I haven't seen any email from the game, even in junk. Is it possible that something on the server had a problem with email addresses that include "+" characters? I think I used one (on gmail, it allows appending arbitrary text to an address while still receiving it on the same account; I find it very useful for automatically sorting mail into folders, and giving a unique address to each individual site makes it evident when a site accidentally or intentionally leaks it to spammers), and I've occasionally seen sites fail to send mail when given something of the sort. Is it possible, that much like those sites, a human saw it and thought "that does not look normal, better preemptively block it just in case it's some sort of attack", much like last names that legitimately include apostrophes on sites vulnerable to SQL injection, or unicode anywhere a programmer never thought outside of printable 7-bit US-ascii input?) (oops, I've rambled into a wall of text)