Internet Explorer (5.1 and now 5.2) appears to have become rather unstable since my upgrade to 10.1.5. Closing an IE5 window every so often -- and this doesn't appear related in any way to Window contents, number of windows, or whatnot -- blows up the whole app. This isn't localized to only one machine; both my iMac and iBook have suffered the same bug since upgrading. Anyone else experiencing this?