Link Rollover Help Needed

I have tried to implement a link rollover as described in:
http://www.alistapart.com/articles/sprites/
and other references posted on this newsgroup.

My attempt resulted in grossly mangled anchor's in Mozilla, but
proper operation in Konquerer and (except for the transparencies in
the PNGs) Internet Explorer. (I added a one pixel outline to try
to debug the problem)

I stripped out everything but the rollover to make a test page to
post, and now one of the anchors is mangled in Konquerer!

My page is at: http://www.kashrut.com/testcss/

Could someone please tell me what I am doing wrong !?

Stuart Scharf
(strip the nospam from my email to get proper address)