I installed the KB2950358 hotfix. So far svchost.exe is just slowly increasing like it has been since the KB2847346 hotfix. It didn't improve it any more, but it didn't make it worse either. It would be nice to have a full fix for the memory leak, but this is still good enough.
I installed the KB2950358 hotfix as well, but did not help. I have not messed with IE vers. NSI fine for a few days then goes multi-GB. 2008R2 SP1 with Hyper-V.