Do different browsers effect SE positions for same keyword in same search engine

[Monalisa maitra]

Hello Every body,

Am seeing some strange behavior of my website when m trying to find out its listing in different Browsers(Mainly IE and Firefox) for different search engines(Mainly Google)...

For a particular keyword m getting no 1 position in Google in IE and for the same keyword m getting no 7th position in Google when m checking it in Firefox....

Cannot understand why is this huge difference...same IP same datacentre...but different results in IE and Firefox...

Please do help me opt to find answer for the above problem m facing it sice days...

Thanx in advance....

Regards
Monalisa