I received an error when trying to update 3.2 also, not sure if the problem I had was the same as the original poster but I’ll copy and paste the error message here in case it helps….
Unpacking the update…
Could not copy file. jetpack/languages/jetpack-pt_BR.po
Oh! Thank you Digg that bit of code seemed to fix the problem. A million thank yous!
I am having the same trouble as the original poster. This is quite frustrating to not be able to login to the admin panel. Any word from WP support on this problem yet?
I’m having this same problem as well. I cleared cookies, tried from different browsers, and even different computers. Hoping for a fix sometime today so management of blog can continue without downgrading WP versions.