Kestrel is now out as of today. It's really quite fast and I have to admit that for an alpha (which I've never installed before), it appears very stable. Did I say it was fast? Seriously, this release may cause me to switch over to Opera as my default.
The Linux printing problem has been reported as a bug, with information that now may lead them to the problem.
Now that I have Opera for Windows running (had Opera-related registry keys that had to be deleted first), Tools/Appearances/Buttons/Preferences, nothing can be selected... Amd that has been reported as a bug too.