Until the Precise I was using only 32bit Ubuntu. With these release I've decided to try 64bit and made a clean install (besides the Home folder which is the same for 3+ years). Aside from not been able to build the 32bit version of Wine without chroot environment I've found the 64bit flavor of Ubuntu to be much slower. I don't know what's causing it but it's really much slower than the 11.10 32bit that I was using before. There are also problems with programs nuvolaplayer is even more crashy and very slugish (that didn't exist on 32bit). Flash Player is just unusable but I could use it on 32bit with much less crashes. That's my hardware configuration: Kernel: Linux 3.2.0-24-generic x86_64 Distro: Ubuntu 12.04 LTS CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ 2 cores/threads 2300.00 MHz RAM: GeIL 2 GB DDR II 800 Dual Ultra CL4 GPU: GeForce 9600 GT/PCIe/SSE2 (nvidia-current 295.40) I didn't check how the 32bit version of Precise would perform on this machine.