Regexp routing problems in 2.2.2 since 2.1.0

Hi, just upgraded an app from Rails 2.1.0 to 2.2.2 and finding some of my routes stopped working

URL which doesn't match is: http://blah/blog/auth/login

Route is: map.connect 'blog/:controller/:action/:id', :requirements => {:controller => /(auth|asdf)/}

In fact, neither does this match: map.connect 'blog/:controller/:action/:id', :requirements => {:controller => /(auth)/}

But this does: map.connect 'blog/:controller/:action/:id', :requirements => {:controller => /auth/}

So the problem seems to be that "( )" syntax is breaking the regexp parsing. Curiously though the regexp does work for link generation, it's only route recognition which breaks

Can anyone give me a quick workaround for this, quite a lot or routes to alter otherwise...