Windows7 network drive refresh problem

My company runs a Small Business Server 2008, with about 10 Win XP Pro clients. I recently installed Windows 7 Ultimate from our Action Pack subscription onto my PC. I am noticing that occasionally, if another user adds a folder into a shared network drive, I cannot see this new folder unless I log out, then back in. Selecting refresh does nothing. It is not a rights issue beacuse my account is a domain admin. Anybody else experiencing this?