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Yup - you *might* lose the cache, but the picture tags and crops are stored with the image files, not centrally.
Another re-installing question. For reasons too numerous to list here I had to reformat the hard drive of my G4 and when I reinstalled PM I noticed that it keeps adding a new user to my user folder. When I set up the machine I made the short name for the user something different than what the default would be. My new short user name is 'tmize' the default would have been 'toddmizener'. When I fire up PM it creates a new 'toddmizener' folder in the user folder. My question is this going to cuase any problems for any other programs or for PM. Changing the shortname is a very difficult thing so I would rather just leave it alone if I can. Any ideas?