Just a small note on this update, the 7.4.2 update was really bad for me (one Macbook Pro and one Windows XP machine), but the 7.5.2 seems to be quite stable for both the Macbook and the Windows XP machine.
Update 2011-01-23: The 7.5.2 is actually very stable and I can really recommend it. The wireless connections both to the Macbook and the Windows machine is much more stable!
Update 2011-03-06: Well… nope, they have fucked up agan! 😛 😛 The wireless connection IS more stable than before but it seems that under heavy load (just a theory at the moment) it hangs and then IT IS IMPOSSIBLE TO restart with the LAN cable plugged in.
Update 2011-03-13: Ok, after some experimenting and a suggestion from my brother in law, it seems that setting the wireless channel to a fixed value (1 in my case) seems to have stabilized things.