Steps:
1. Open iTunes and Mini-Player, use it successfully
2. Close and Re-open iTunes holding down the Option key to switch libraries
3. Switch to another library on the same machine
4. Open mini-player, press Cmd-R
-- it looks like it's refreshing, but it doesn't. the mini player is still using the old library information --
Work around:
5. Quit and Restart Aflred
7. Open the mini-player, Cmd-R to refresh
-- the mini player library information is now refreshed properly --
Notes:
- The path to the current iTunes library is *always* correctly shown in Alfred's preferences.
- Refresh seems to simply always refresh the library that was in effect at the time Alfred was started