Thanks, guys! It's working much better now. Apparently the sessions folders get clogged even when the browser is closed & restarted every day. Something else to keep an eye on!

My Opera browser responds to every command (e.g., switch windows, close a window, minimize, maximize) with a pause of 4-6 seconds, followed by the expected action. Scrolling and typing - as when tying this message - are similarly interrupted every few seconds by random pauses. This situation began while using V. 27 and continues after updating to V. 28. I'm willing to believe it's related to my operating system (Win7) or processor (Intel Duo E4500 2.2GHz w/6GB RAM), but it affects no other applications.

Anyone else experiencing this problem, and how can it be solved without switching browsers? Thanks!
FredG