Nav menu looks like crap in chrome but only on pc

The nav menu of my site (americanindustiralinc.com/wp) is jacked up in chrome - but only on pc.
it looks perfectly fine in chrome on mac os x (lion)
but ive checked it on chrome for windows (both xp and 7) and it looks different.
I dont understand what the difference is.

i thought Chrome was Chrome as far as how it displays things. Its all webkit either way, right?
why is it different from mac to pc?

Nah, it’s doing that on Mac Chrome for me too. The problem is you are gambling on how each browser measures px. There is a nice solution for this, mentioned here and elsewhere:

I fixed it. thank you.