[xwiki-users] Toucan performance on Opera

I'm browsing http://xwiki.org using Opera 9.01 for Windows XP, and I'm noticing significant performance problems. Specifically, scrolling the page is slow and jerky. When I suffix a page with "?skin=albatross" I no longer notice these problems, and when I view the same page instead using Firefox (v2.0.0.12) I again do not notice these problems. Any idea what is going on? Thanks, Paul D. Grodt