Tab-Space Forum Replying leads to Flagrant System Error

I've lost count of the number of posts I've lost to a "Flagrant System Error" recently, but I've finally realised it's because the Tab-Space method of replying to a thread is at fault. Here's some pictures:

TL;DR: If you press tab and then space when trying to post a reply to a thread, while the cursor is in the reply box, it moves to some invisible UI element and presses that instead of the reply button. This causes a flagrant system error 100% of the time, which also deletes your whole reply (nice).

@bollard: Sorry about that, that's a nasty bug.

Thanks for all the debugging help! We'll look at this ASAP.

@wcarle: No worries, and thanks for looking in to it! I hope the instructions were clear enough.

@bollard: Fix for this is finally live!

@wcarle: Fantastic! Just tested and it worked great :)

hmmm

*edit* tried to recreate it but failed, i've had that error before too