Windows 7: sidebar.exe - excessive memory usage over time

All,

After rebooting my fully-patched Windows 7 Pro machine today, I noted that sidebar.exe was using ~35 MB of memory. Just prior to rebooting, it was using ~170 MB of memory. Someplace, memory is getting lost.

The gadgets I use are:

• Fidelity Market Monitor
• MSN Weather
• My To-Do List
• The Clock
• Calender

Are any of these known to be problematic? Other than having just one running at a time and monitoring memory usage, is there a fast/easy way to determine which (if any) is problematic? Does the actual application itself leak memory?

Thanks.