In the past three days, I've answered too many questions about installing Ubuntu Hardy on an AMD64 platform. Most of them were excited to move to 64 bit. Many of the others were being encouraged to use it. I felt like the lone voice crying "No! Don't do it!" Ubuntu 64 bit just has too many problems, and time is running out to fix them.
Flash is a disaster. It's not really great on x86, either, since there's no hash check before the package is installed and the file downloaded from Adobe doesn't match the hash, leaving the package half installed and broken, requiring manual intervention. On AMD64, however, you've got the added issue of nspluginwrapper (via nsviewer.bin) crashing about once an hour, meaning that the user has to close and reopen Firefox. I feel like I'm back on WindowsME and the Active Desktop.
There's more to the Flash problem, though, because Pulse Audio doesn't work with it, either. In a last attempt to fix the stability problems, libflashsupport was removed as a dependency and users were suggested to remove it from the system. It made Flash work with Pulse Audio, but it also caused instability. Removing it stops the crashes, but makes audio inconsistent when Flash locks ALSA down. Neither choice was good, but crashes are definitely worse.
Then there's F-Spot .... The dots here represent waiting for it to open. F-Spot was chosen as the default photo manager for Hardy, pushing out GThumb (which, by the way, was a decision I supported). The caveat by the development team was that they needed to make sure that F-Spot was a lot more stable than it had been to that point in time. About four weeks ago, an update to F-Spot or Mono caused the program to segfault on every AMD64 Hardy system that I have. The bug still hasn't been looked at.Shipping an LTS with a non-functioning photo manager is not a good choice.
There is a long list of other problems to be worked on in the next few days.
I would suggest that Canonical do what they did for the last LTS -- delay the release by two months -- but I doubt they'll do that this close to the release date. Whatever happened to "We'll release it when it's ready?"