on ubuntu it doesn't work as well as the beta 2 (for me anyway)
I then installed opera_9.50.etch-qt3_i386.deb using GDebi, went well but DragonFly doesn't work (Opera does but not DF). Something is fucked up with the windowing. It worked "well" with beta 2 ...
My mistake, I love Opera and fucked up the installation :P
By the way, as far as I know, DragonFly is just some javascript that hooks into the interpreter/VM, so you might be able to download it from their developer website to fix the problem.
DragonFly not finished yet but worth a look ;)