Default VS2010 IList type in Intellisense/ReSharper

Let's say I have the following function:

public IList<string> Foo()
{
  // code goes here
}

I'm used to being able to type in return new and as soon as I hit [SPACE], Intellisense pops up and suggests List<string> but right now it defaults to ReadOnlyCollectionBuilder<string> and the only other option in there is TrackableCollection<string>. I recently rebuilt my dev environment and I no longer get this functionality. I THOUGHT that this was the default. I've never had this problem before (and have built more than half 开发者_开发百科a dozen development environments with VS2010).

What setting(s) do I change to get this back?

I finally figured the answer out to this. Specific versions (but not all) of Telerik's JustCode was causing this. Upgrading, disabling, or uninstalling JustCode finally made this problem go away.