I guess you are talking about the Spry menu, which is split between two lines
on my PC IE7 display with several middle items dropped to the line below. If
this is not deliberate, then ....
IE handles padding and margins differently from the other browsers. When I
get this sort of problem, I parallel preview in IE and FireFox (or whatever)
and adjust parameters until everything lines up. Tedious experimentation.
I'll be interested to hear if Murray or anyone else knows a better way.