My login keychain keeps locking on me. I keep verifying that the autolock in 5 minutes checkbox is not set, and it isn't, somehow my keychain still locks (but less frequently than every 5min).

I need to move my keychain to another system. Keychain has an 'Export' menu item under the 'File' menu, but I can't seem to get it to activate. I tried it locked/unlocked, etc. It stays ...