Please test your changes very carefully before committing them. There has been a lot of irritation at various projects when the user interface changed.
That's a bit harsh. The changes were made in response to user requests, plus a separate user-interface study that indicated new users frequently got confused about what the [edit] links were editing, because they were too high off the line. So the changes were made to reduce user-interface irritation.
Furthermore those changes were made in subversion on Wednesday, but were not rolled out to be live for approximately 4 days, which is probably a longer delay that usual. And in that time, the developers (who use a variety of platforms and browsers) had time to test it, and report/fix any problems found before they impacted general users. I certainly tested it before it was rolled out in the browsers that I use, and I didn't find any problems, and as far as I'm aware neither did anyone else.
It's easy to be wise after the event, but the unfortunate fact is that sometimes you only find out about problems after you've gone live. If anyone wants to help reduce this by testing SVN head, I'm sure we'd all be glad to hear of any problems they find.
All the best, Nick.