Yet another problem in my wonderful server, after switching from branch to trunk, and somehow managing to keep all of my custom database information, the server no longer lets you mount. People can buy mounts, people can click on mounts and it will cast the spell for 3-5 seconds, whatever the time is, and then they do the mount summon animation, and nothing. They even have the buff that says they're mounted. But no increased speed, and no mount. I also tried to .learn a mount spell, but it does the exact same thing.
I'd love an answer, and of course +Rep