As the title suggests...
What browser are you using? And what are the plus points versus IE7(default)
For instance I have issues with IE7 on my bedroom pc (wi-fi N) - it hangs really bad! But Firefox has no such issues, i really wanted to switch back to IE7, now i have a copy of Adobe Acrobat pro - very handy for invoices if you buy online alot
EDIT: I voted Firefox 3 for the above reason