I am guessing from lack of reply that there is no solution for this.
At the moment I have to use either IE or Chrome at work. Since I save bookmarks at work using Chrome I have to use Chrome at home as well to access them. It is a shame really as I really liked using Opera for years.
Another thing I thought maybe worth mentioning which was introduced a couple of months ago in my company is the use of something called "SearchAhead" powered by cisco and cannot be disabled. It basically searches ahead and displays a tick or a cross next to the weblink on a web search.