I don't know how much things have improved with Ibex, but there are some (mostly resolvable) issues with 64bit on hardy. You need to play around to find soluti

I don't know how much things have improved with Ibex, but there are some (mostly resolvable) issues with 64bit on hardy. You need to play around to find solutions for some bits of software you don't have the source to, e.g. flash plugin, ndiswrapper wifi drivers. Ubuntu forums are good for this. The only unresolved 64bit issue I hit was that Java LiveConnect (accessing browser javascript from java applets) was broken in the 64-bit java available for Hardy. Haven't checked to see if it's fixed in Ibex yet. (Hmm...I abbreviate Hardy Heron => Heron, but Intrepid Ibex => Ibex. I wonder why.) Yes, core2 is 64-bit.