Thanks for the post but I just worry our app won't be as easy to upgrade. We've got a Rails 2.3 app that I'd really love to upgrade ... Did you not encounter a

Thanks for the post but I just worry our app won't be as easy to upgrade. We've got a Rails 2.3 app that I'd really love to upgrade ... Did you not encounter any gems/plugins that broke after the upgrade? (we've got a hacked version of attachment_fu for images)