And I appreciate your help!
No problem 
I have no explanation why your win2k behaves differently to the ones at browsercam but on checking the widths of elements from your screenshot it looks like your ie6 is either in quirks mode or is ie5 disguised as ie6
It seems the container is too small and is forcing elements to wrap early which is consistent with the broken box model which will happen in quirks mode. I have heard that proxy servers can put code above the displayed page and cause quirks mode in error but I assume you had a direct connection to the site.
Scratch all that - I’ve just realised what the problem is
Your browser has the text-size setting at small instead of the default medium. This means that the element wrappers sized in ems are too small for the size of some of the inputs which were still sized in pixels. I’ve just cheked in ie6 and changed the text size to small and it now matches the image you showed me - I’m glad I realised that as it was driving me mad thinking that browerscam was wrong 
Changing all elements to em width (most are anyway) would solve the problem and also allow the layout to scale properly.
I think you’ll find that the problem is solved now (with any luck) :).