Unable to Post New Topics?

Hey guys, please let me know if you start seeing this problem:

Make a New Topic
Go to post it
403 Forbidden Error happens

Miss Meerkat had it happen to her and it's just happened to me, so I need to know if it's happening to others so we can get this worked out a little better. It happened to me when I was transferring topics from Temp Sibb, and I was going pretty fast, so I don't know if it was the speed of it or what. I'm contacting PHPBB and my host about this, but I wanted to call this out just in case more people had problems with it.

EDIT:
Well, that got resolved quickly. Turns out that we were getting flagged for posting more than 4 URLs consecutively, which made Meerkat and I look like spambots to the system, but this has been whitelisted and it shouldn't be a problem anymore. Please bump this thread if it ever comes up again, tho.

Hey Katimus, I'm still having this issue at times. I'm trying to create a new topic in the Xeno 18+ section, but I'm still getting errors. I don't need to post it right now, but I thought I'd alert you.

Oh snap. I'll get on it.