If you use AdBlocker + IE11 then I fully expect you to have problems with Neowin (and other websites) I know this because I tested it myself when we posted about the alpha version of AdBlock being released AdBlock sometimes blocks genuine code that needs to run to make Neowin fully functional and AdBlock for IE doesn't have any (working) options to whitelist etc.
We know of one or two issues with IE10 logging in from main that have been reported as a bug btw.
Posted with Chrome, will test IE11 now.
Confirmed it's a bug, and also confirmed it's a bug on the official IPB forums (tried multi quoting here: http://community.inv...th-logging-out/)
Posted with IE11 (no add-ons)
I was able to login from the main site just fine as well using IE11 but I had my login info saved in the browser (don't know if that makes a difference) "Remember Me" option.