Do you mean since the update to 2.4.5? Before that we had 2.4.4 which is also in trusty-proposed (if you want to try that to rule in/out this version of webkit) and I didn't hear any reports of such behaviour.
I'm afraid I don't see the same here on either of my machines. Perhaps #webkitgtk+ (freenode) could help more specifically. ** Package changed: webkit (Ubuntu) => webkitgtk (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to webkit in Ubuntu. https://bugs.launchpad.net/bugs/1369693 Title: WebKit-based applications are unusably sluggish in Utopic Status in “webkitgtk” package in Ubuntu: New Bug description: Today I made a fresh install of the latest daily build of 14.10 (Utopic). Unfortunately applications that use WebKit, including Geary and Epiphany, are now strangely sluggish. When I type characters (e.g. in a new message in Geary or in a form field in Epiphany) they don't echo for several seconds. (During that time the system is apparently not consuming CPU.) Scrolling through any page that contains a form field in Epiphany is similarly painfully sluggish. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/webkitgtk/+bug/1369693/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp