Some users unable to post - time between posts error

[Deceiver]

That did the trick. Thanks Wayne Luke...

[Deceiver]

G'day,

I recently upgraded our forum from 4.x to 5.5.3 (now 5.5.4 Patch 1), which went well, but I've had a user PM me claiming he's unable to post.
Sure enough, after logging in as...

[Deceiver]

Hi all,

I've been putting together a theme for vB 5 in preparation for our board to make the long-awaited upgrade from vBulletin 4.x, and while I have most of it taken care of, I do have...