Should I switch to 64bit Ubuntu? [closed]

Solution 1:

Definitely go 64bit. Debian and Ubuntu have good compatibility solutions for 32-bit stuff these days, and since it's they provide free software in a huge repository of applications compiled for your 64-bit version, you're just about in the best place you can be to have optimised software for your 64-bit hardware. Highly recommended.

Solution 2:

A few releases ago, there were a variety of weirdnesses.

I haven't seen any that have affected me since 8.04, though.