Strange Look of the Code/Quote/PHP/HTML blocks in post

[HM666]

I've got this weird thing going on my site. The code, html, php & quote boxes inside posts are literally missing the boxes! You can see from my screen shot what I mean.

I just upgraded to the latest vBulletin 4.2.2 P4 today. I had not checked this before so I do not know if I had this issue before the update or if this is something in IB's infinite wisdom that they have decided to change essentially making it difficult to "actually" read a post with code, html, php or a quote in it.

So how do I fix this to actually HAVE boxes again? Did IB kill the boxes or something? Or is it just me?

I'm using the default skin that was installed when I installed the board & I disabled the mods globally and tried posting again but had the same result.