i have the same problem with Opera 16 and 17, currently on 17 though
i am keeping both v12.16 and v17, but my Opera17 just wont load any pages -- yes, ANY pages including Settings and pages that doesnt even require any internet connection when i am tabbing out from an online game

this doesnt happen with my Opera 12.16, my Opera17 works like wonder when i'm not tabbing out from any games..
this is very bothering me as i usually need to tab out to browse the internet when im in game