Today I was using ReSharper to edit some source code and needed to quickly check some source on another computer. I opened Visual Studio on the other computer, checked the code, and closed Visual Studio. When I returned to my main computer, I was greeted with a dialog complaining that ReSharper had detected a second instance of the license on the network and gave me the option to enter a new license or to disable ReSharper.
I should have been allowed to continue because the other license was no longer in use, but ReSharper does not allow this option. The more serious complaint is that I could not get the ReSharper plug-in to restart after it disabled itself. I could go into Tools | Add-In Manager and check ReSharper, but it wouldn't restart. I had to exit Visual Studio to get it to work again. After restarting Visual Studio, the Refactor menu is back and I'm not sure why. I used Customize to manually remove it.
I'm using Visual Studio 2005 SP1 and ReSharper 2.5 build 326.