Profile Tabs not appearing
 

For some reason, when I view the profiles of users, instead of tabs appearing, the information contained in the tabs just appears as one list of drop down menus.

What could be wrong with this? Template Edits?

Probably your style. Try this:
Create a new style with no parent:

• Styles & Templates > Style Manager > Add New Style
• Parent Style: No Parent Style
• Title: Default vBulletin
• Allow User Selection: Yes
• Save

Then browse the site using that totally default vbulletin style - do you still have the same problem?

I'll try that, but all my styles are based off one master style (and on all of the styles, including the Default vB Styles, it doesn't show the tabs)

Okay, it works now. However, I won't be able to move all my styles to the style I created, since there are many template edits on the master style, which all my styles base the edits off of.

Well, now you know it is your style that is the problem. So, you check out a page in the non-working style, copy the page source, then check out the page in a working style, copy the page source, and compare the two. See if you can spot where the problem is. Usually, it is because you put some javascript that is in the footer, into some table. It cannot be in a table. So, you move it out of the table, and it works. But, that is just usually, I have no idea if that is the problem you are seeing.