It's not frequent, but it does happen, and usually in unexpected ways. If the whole site is completely broken I usually turn off ad-block and everything is fin

It's not frequent, but it does happen, and usually in unexpected ways. If the whole site is completely broken I usually turn off ad-block and everything is fine. The problem is when the site mostly works but doesn't do some little important thing, like save your changes, that it gets really frustrating.