Apple today released MobileMe Control Panel 1.2 (for Windows).
This update provides better support for syncing a large number of contacts (more than 2,000) and prevents syncing of data between Microsoft Exchange Server and MobileMe, a configuration that is not supported.
The update weighs in at 1.6 MB and requires Windows XP Home or Professional SP2 or Vista SP1 or later, iTunes 8.0.1 or later, and a MobileMe account. MobileMe Control Panel was last updated on September 9th.