not seeing those problems here
but that may be as a result of using 3.6.28
I think they dropped the ball with v.4. and up
so I refused the updates whenever they popped up the dialog
and the last time I saw an update notice was around v. 11 or 12
I received an update dialog which Threatened me with a forced update at next browser start
and the previous update dialog had stated my XP x64 OS was not supported anymore (actually it never was) and I wouldn't be able to update to v.10
it was after the Threat of forced update that I disabled all Firefox update checks on all my systems
the only issues I have are because of security settings, add-ons & preferences I use and not the browser specifically
eg. the + / - vote buttons have never worked, and always goes to page not found when clicked
