2008/4/4, :
> Sometimes however, instead of all fitting on the screen, all the options are vertical with a

this means that the browser couldn't load the corresponding .css files
for some reason. The .css files tell the browser how to layout the
content -- without them, the browser can do nothing but display the
options as what they are, a simple list.

Bugzilla keeps its .css files in the skins/ directory (or rather,
subdirectories of this). You need to find out what reasons are behind
your browser not being able to download them.