I unchecked SFCoreHelper in the Login Items in my Admin account and restarted. That didn't help.
I suppose it may be logical that SF2 might cause trouble, as I don't think it is listed as working with OS 10.6, but it has been working enough that I haven't felt compelled to buy the upgrade. I don't know how to go about uninstalling SF 2.
I looked for the SFCoreHelper file and foound it in:
Admin/Library/Logs/Extensis/Suitcase Fusion Logs
Other items in that folder include:
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/FMCo re.log
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/FMCo re1.log
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/Font Tool.log
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/sfco re-prefpane
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/SFCo reHelper
file://localhost/Users/admin/Library/Logs/Extensis/Suitcase%20Fusion%20Logs/Suit case%20Fusion%202_SDK.log
In the Extensis folkder there is also a folder labeled UTC Logs which contains:
file://localhost/Users/admin/Library/Logs/Extensis/UTC%20Logs/FMCore.log
file://localhost/Users/admin/Library/Logs/Extensis/UTC%20Logs/utcore-prefpane
file://localhost/Users/admin/Library/Logs/Extensis/UTC%20Logs/UTCoreHelper
John