I have supposedly updated my system to 10.4.3, however when looking at the 'about finder' menu it says im on 10.4.2. is this a bug which other people have experienced or has my system not actually been upgraded?
Finder version is fine, I don't think its a bug just apple didn't update anything in the Finder area so no need to change the plist to reflect. On the side getting the info about your computer under the apple menu " about this mac" should give you what overall version of the OS you are running.
Wouldn't it be 2 versions behind? If there was no update from 10.4.2 > 10.4.3 (as grapes911 mentioned), and I'm running 10.4.2 with Finder 10.4.1. In that case the Finder's last update was probably from 10.4.1 > 10.4.2.