Problem 1 I had my Macbook's logic board replaced around a week or two ago due to a bad fan sensor, and have since experienced some additional problems after having it returned. Now, without fail, I seem to be losing free memory the longer my Mac stays on, despite being on or off the AC Adapter (that probably has nothing to do with it, but I thought I'd add it). I only have a gig of ram, so after a fresh reboot istat pro will show roughly 500 mb's of free memory. According to my Activity Monitor Safari was using 190 mbs, and the only other program running is textedit (I forgot to look as to how much memory it was using). Despite only using these two programs, (even while closing textedit and / or opening various tabs & windows in Safari), my free memory will drop to around 22-40 mb's. Now, what in the world is eating up that much memory? While writing this, I repaired my disk permissions and with Safari, textedit and the activity monitor open, I'm hovering around a constant 432 free mb's. I'm going to keep it on for awhile and monitor any changes that may occur. Do you think repairing the permissions has fixed the problem? What is / was the problem? Problem 2 I have multiple (3+) Dashboard clients running in my processes list for some reason. Is that normal? Problem 3 The new logic board came with a new integrated N airport card, which gave me many problems the first couple of days after the repair. It was slow to connect to my home B wifi network, and also slow to connect to the university campus network as well. I erased then re-added both networks, plus refreshed the DHCP a number of times as well. The former did not do much, and the latter made it connect to the internet after having it refuse to connect for around five minutes. The network pops up in the top right-hand corner of the screen instantly when the computer turns on / awakens, but the internet is slow to load in both Safari and Firefox. I have both browsers and the Mac fully up-to-date. Today it has been fairly quick on both networks, although the signal strength continues to be much weaker than before, and some pages take longer to load than they should. Should I take it back in for repairs and get them to replace the logic board once more? Thanks to anyone who reads my entire post and offers any feedback!