In case you missed it, the Visual Studio team last week made a minor update to the VS 2010 Productivity Power Tool Extensions to fix a few bugs and performance issues that people reported with the last release. 

Sean has a blog post with more details about the update here.  The update included fixes for:

Poor performance with Solution Navigator searches on large projects. In this revision, we've made some optimizations to the search algorithm. Search will also now only be initiated after two characters are typed in the search box.

Items in Solution Folders were not sorted.  In this revision, they are sorted alphabetically.

Invoking Quick Access could cause a crash on some machine configurations. This issue has been resolved in the current revision.

Ctrl+1 & Ctrl+2 were not configurable in the Solution Navigator, which blocked the ability to type @ on some keyboards. This revision provides the Edit.ShowSolutionNavigatorPopupForSelection & Edit.ShowSolutionNavigatorPopupForFile commands which can be rebound using Tools => Options => Environment => Keyboard.

If you have a previous build of the Power Tool Extensions installed you use the “Tools->Extension Manager” menu command, select the power tools extension and then click the “update” button to upgrade to the latest build.