So yesterday automatic Windows update installed IE10, today I noticed that links in certain applications open in IE10 instead of my configured default browser, which every link from this or any other application used to open in before that update and the reboot that followed the update.
I checked the Default Programs section in the system control panel, expecting maybe Microsoft wanted to get themselves in any more trouble with the EU and changing the default to IE. This was not the case however, all the associations were still pointing to the configured default browser, I noticed however I could not uncheck the defaults already set.
So despite the obvious configuration being correct, links would still open in IE10 even after yet another reboot.
I went ahead and checked the registry associations, and found that http(s) protocol as well as htm(l) filetypes were associated with Internet Explorer with various EditFlags set (presumably to prevent changing them through the user interface, or to ignore the user interface settings).
Seriously Microsoft? Don't you have enough trouble yet?