A minor issue is that the built in Netbeans Subversion integration doesn’t work in a 64-bit install. It helpfully provides a link to the Subversion client software at CollaNet, however the most recent version for Windows is v1.5.5 which isn’t a lot of help if you are using Subversion 1.6.x.
All is not lost though, slik subversion provide a free command line Subversion package in both 32-bit and 64-bit versions. This installed without any problems and all that is required is to set the ‘Path to the SVN executable File:’ in Netbeans to C:\Program Files\SilkSvn\bin .