I have found a bug in Opera 11.01 for Mac OS. The bookmark folders in the bookmark menu will not expand to show their contents. I discovered the location where that bug resides. It is in the Opera.app package within Contents > Frameworks > Opera.framework > Versions > A > Opera. If I substitute that item from version 11.00, it corrects the problem with the bookmark folders in the menu not expanding. Opera now identifies itself as version 11.00. Now how can I get Opera to identify itself as the proper version?
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; rv:22.214.171.124) Gecko Firefox/3.6.13