If you've been following my blog you'd know that I'm a recent Mac convert trial (can't call it a convert when I have 15 other Windows PCs in the house).  Anyway, when I bought my Mac it came with OSX 10.4 on it, but there was a 10.5 Leopard disc that was shipped in the box as a free upgrade.  Well, you can't go sticking a free software upgrade in the box and let it sneak by me without immediately installing it.  So I've been using Leopard since I first got the MacBook Pro.  Generally I've had a lot of success with it, aside from a minor nuance with the wireless that never seems to work unless I reboot my wireless router (seems to be Mac related though since other Windows systems are able to use the wireless router during this time).  The inexcusable problem though has been a frequently occuring loss of keyboard functionality that varies from 30 to 60 seconds.  During this time, the touchpad continues to work but no keyboard keys register (including the function keys).  For a while I considered that maybe my inept ability with Mac left me in some weird function key toggled mode, or I had a stuck key or something like that.  Or even that my usage of VMware Fusion was somehow leaving my keyboard in a VM-controlled state or some such nonsense.  However, a quick Google search tells a different story.  TONS of Mac users are experiencing the issue since their upgrade to Leopard.  Anyway, I finally spent a few cycles today investigating this issue and I found out that Apple has released a patch for this two days ago.  You must have upgraded to 10.5.1 in order to use the patch.  I've applied it and so far (crossed fingers) I haven't had any keyboard loss.