[niyazpk]

IE for other platforms? No Please. There are at least a few niche mac/linux websites which you can build without worrying about cross-browser issues. You introduce IE and the whole echo-system lags behind.

Further, there may be reasons why IE is not so portable to other platforms. Considering the fact that IE9 is not currently (and probably will never be) available for even Windows XP, I don't think that a cross-platform version is a realistic expectation.

IIRC, IE is an integral part of the Windows OS (for whatever business/architectural reasons) and this means that producing a Linux/Mac version may be more work that you think it is.