VB adding <br>'s to posts

[ToKey]

I'm sure someone else has run into this but I haven't seen anything.

This is weird behavior where <br>s are getting added to posts, specifically when using table tags.

For instance, I'll have the following post:

This is where we will keep track of who buys admin and how long they will have it for.
[table]
[tr]
[td]Name[/td]
[td]SteamID[/td]
[td]Type[/td]
[...]

I've tried both with BB table tags and real HTML. On submitting around 100 <br> tags get added to the outputted HTML just before the table tag.

Anyone else run into this? What function is doing this so I can try and fix it.