1.42 ghz mini, 512 ram, superdrive, bluetooth & airport. Just switched to mac & purchased mini 5 days ago; getting used to the machine and OS. Works great......except later in the day (evenings) after the machine has been on it really gets bogged down. The 'bounce' in the dock icons is really delayed and the program start-ups are noticeably slower, lots of beach balls. Watched this phenomenon again this evening with one of my college kids observing, was noticably slower in starting apps (e.g. iphoto, system preferences) than this afternoon. Re-started the machine, and things ran great, were practically instantaneous. As I said before, just learning the machine, the interface & the OS. not doing anything really processor intensive and hardly any multi-tasking; probably no more than 3-4 apps ever open at one time. Ideas, help, please.