In the meantime I'm using IE7pro, which is approaching Opera's feature set and I'm coming closer to a conclusion that all those unique Opera's features are not worth the effort put in its maintenance and always updating and reinstalling.
-yksyks
I too have had problems with Opera, recently with Flash which suddenly stopped working. Luckily I still had Opera 9.27 Portable installed. I upgraded that to Opera 9.50 portable and have had no problems since. I think that its best to stick to portable versions of Opera as they tend to give lesser problems. If something goes wrong, you can always delete the folder and not suffer registry corruption or having to manually clear out the Application Data folder.
I recommend getting
this version as it still stores details of the surfed session to the same folder, so you can restore closed windows upon restart, just like a installed version.