A new version of ActiveSync is now available from the Microsoft web site. Version 3.8 was posted yesterday with little information as to what enhancements and bug fixes it contains.
Microsoft ActiveSync 3.8 is the latest synchronization software for Windows Mobile-based Pocket PCs and Smartphones. ActiveSync 3.8 contains fixes making synchronization more trouble free than ever before and includes all the significant improvements brought to you in ActiveSync 3.5, 3.6, and 3.7.1: it is easy to install and use while offering the best levels of reliability.
Update: PocketPC Thoughts reports that the changes have to do with security. Windows XP SP2 security pop up warnings that appear the first time a Windows Mobile devices is docked have been eliminated and remote PC Sync (via Wifi or LAN) is now turned off by default. However, the latter can be enabled by users if needed.