Unable to download 4.3 software onto my 3GSAlarms going on 1 hour out iPhone 3G

I am having 2 problems with my iPhone at the moment. For one, ever since the daylight savings time change last sunday, my phone will alert me of my 9:43 am alarm at 8:43 am instead. The normal displayed time is accurate, but the time that it uses for reference as to when to sound the alarm is an hour out.
I thought that maybe upgrading to the new software might just fix this problem by essentially reinstalling such features as the alarm?
I tried this, but when I go to press the Update button in the iPhone panel in itunes, I get the following message: This current version of itunes (9.2.1) is the current version... Even though I am trying to update my iPhone, not itunes.
I then tried to just get the new version of itunes to remedy this problem, but I cannot, as the new version of itunes requires Mac OS 10.5+, I am operating on Max OS X version 10.4.11.
Am I screwed?
Macbook Mac OS X (10.4.11)