Well, I have this minor issue.
I'm trying to make a background color of one table cell in a table
However, when I do that, save the post and look at the page, it didn't take effect. If I go back to edit it, I'll see that the HTML for the table converted to BBCode, which is why the bgcolor didn't take effect.
I'm wondering if this is a vaultwiki issue or vbulletin and if there's any way around it.