It didn't seem to complain with my (UK) address, and I got the "confirm your email address" mail through and that link worked fine. This was one or two hours ago though, so there may be a new bug or the page (or the DB behind it) may be under sudden load if the link has hit high volume sites like slashdot.
I'd report it to them if I were you, though please make the bug report much more detailed than "it didn't work"...
There is no "hacker style" to filing a good bug report. But I have a bee in my bonnet about bad ones - I often get the equivalent of dropping a car off at the garage for repair with just a note that "it makes a noise".
I'd report it to them if I were you, though please make the bug report much more detailed than "it didn't work"...