jQuery Grid Plugin - jqGrid

I have a situation where the css for a column heading is clashing with some other css directive (somewhere).  You can see an example here:

http:\\\\www.petesworkshop.com\\images\\grid-shot.jpg[Image Can Not Be Found][Image Can Not Be Found]

See how the column headings are grey, instead of the blue gradient and the edit cells for the inline edit are too small?  I am guessing that somewhere there is a name clash so that it doesn't properly render.

Can you tell me what the css class is for the column headings (or maybe it is a textbox issue).  In any case, if I run an example without all the css files I have, it works OK.  If I add the other css references, the column heading doesn't look right so there must be a conflict.

I could use trial and error but that would take too long (there are a bunch of css files).  Any pointers?