I have found that opea mini bookmarks stored in folder C\Private\102033E6\MIDlets[1014fb9f]\rms in files with extensions ".rs". I saved them, deleted opera mini 4.5 and installed it again. It works without my bookmarks of course. But then i put my old .rs files in new opera mini folder - opera mini gets same reaction as in first post above: message @installing@ and shut down.
seems files are corrupted?