I´am late, just a day though. Opera 9.01 has been released yesterday and it is officially available at the Opera homepage. Just follow the link above or check for updates in Opera to be lead to the download page. There have been lots of changes in this version, actually more than I will be able to list here at ghacks. For a full list read the Opera 9.01 changelog entry.
The changes are mostly bugfixes or optimisations like newsfeeds that can be renamed again, performance improvements for widgets and solved upload problems with imageshack and similar sites. The chance is pretty high that bugs that you might have encountered have been fixed with this release. Opera is as usual available for windows, linux, mac and several other browsers including mobile ones.

Opera 9.5 Alpha released