This is a bit dated news, but I just noticed this release. It appears to have been put up on February 17. For those of you who like to have the latest version of Opera: Changelog for Opera for Windows 8.52 [opera.com]
12:05 pm on Feb 24, 2006 (gmt 0)
Must be a really important security update as the program notified me today about the update...
Fixed problem with missing keypresses when switching between applications.
That was an annoying little bugger! For a while I thought it was me not hitting the keys hard enough.