The opera portage installs with QT 3, but doesn't work with it. The reason being that the Opera portage installs the version, dynamically linked against QT 2. Opera provides a statically linked package as well, which would work with any QT, and without QT installed. Maybe it's a good idea to switch the portage to the statically linked opera?
As I understand, the opera we curently have works with the qt 2.x we currently have (x11-libs/qt-2.3.1-r?). So we just need to fix the opera depend on qt so that qt2 is emerged, and it will work. Please correct me if I'm wrong; I'm fixing the opera ebuild now.
Yes, that's it, I guess. ">=x11-libs/qt-2.3.0" was not good. But, perhaps, we could also have an opera-static portage, which would not require qt libraries. The current ebuild can be trivially modified to work for the static opera distribution, ustt by changing the archive name (IIRC, s/2-shared/1-static/).
How would a static package be better than a dynamic one? Whe would you choose to use a static one (except to save the qt compiling time)?