Solved! Go to Solution.
the IE10 specific bug you found affects AMD style maps only, and relates to a problem with the measurement widget in general, not to snapping. here is the tracking number for the issue i logged a few minutes ago on your behalf.[NIM093983: Measurement widget doesn't display area calculations in IE10 (AMD apps only).]
i realized this morning after clearing my browser cache that non-AMD apps aren't functioning correctly either. the bug has been updated to acknowledge that the measurement widget is not functioning correctly in IE10 for apps that use any load pattern and our development team is working on a fix.