Mine broke off from the base as well. Berkley replaced them without any fuss mid 2011, but I'm worried that they replaced them with more defective units. I have them in storage and haven't tested them yet. Guess I need to get on that.
Very expensive filters for them to be shaving a few pennies on cheaper adhesive and plastics. Stupid. That's how companies go out of business. (and why an accountant should NEVER run a manufacturing company or be allowed to make any decisions related to quality... been there, done that)
Berkey has recently re-designed the filter, but people who have gotten the new ones are still having separation issues. Please do test your filters.
You also might want to get some food grade silicone for your survival supplies, so that if your Berkey filters in storage separate, you can repair them yourself. Right now though, I want Berkey to replace them, free of charge.
They have no business making fantastic claims about how good their purifier is, when they know good and well that they filters are defective!