i think opera 9.50 isnt cleaned by CCleaner yet as the location of operas cache has changed from the default location of c/docs an setting/userdata/application data / opera profile this location still exsists so cleaner detects operas install an it then cleans empty folders
ive been looking an think ive discovered the new location where data is stored c/docs&settings/user/local setttings/application data/opera/profile/cache4
CCleaner just needs to add this path to its program