Tab Thumbnails Don't Update
Just a minor bug to report. The thumbnails of tabs do not update once the tab is created. So, the thumbnail shows a screen cap of the first page the tab was on, but does not dynamically update, as I believe it should. This is true for pop-up thumbnails as well as thumbnails visible when the tab bar is positioned on the left or right side.
I prefer that the tabs never update, because it's a significant savings in resources.
I'm sure we will, at some time, get the option to have thumbnails update on a schedule of our choosing, just as Opera 12 did. If we do, I will keep it turned off. People who have memory and processor cycles to burn, and who don't mind slowing the browser or the system, will use it, I'm sure.