There should be a css class for this, in which you should set the width to 100% or add a select size
I've tried to put a percent in the '.codeblock', and a size, and the error continues. With the size, I can correct it, but it looks good depending on your screen resolution. The perfect would be that it adapts to the post table, like normally.
Here i give you the url for you can see the error:
http://koomar.byethost6.com/foro/showthr...pid=4#pid4
Try setting a size to .trow