Edit online doesn't work as intended with Windows 7, as the documents open as read-only. This has been confirmed both in the forum and in the JIRA. Is this planned to be fixed for 3.3, either the EE or CE (or does it already work with EE)?
It actually seems to be somewhat intermittent, as I've been able to open some documents for editing once, but not after the first time. Also, those documents are not versioned up when theyr're saved.