We had a lot of Windows TBB users download TBB but then click 'open' rather than 'save'. Then everything worked great, but when they wanted to run it a second time, it was nowhere to be found (since they never saved it anywhere). So for Windows we now have a simple installer that simply unpacks stuff and sticks it into the self-contained directory, just like before except it's more like what many Windows users expect. But smart users don't *know* that that's all it's doing. We should a) make it clearer in the installer text itself that TBB remains self-contained in just the directory they specify, and b) make it clearer on the download webpage when they're fetching it.