Cannot remove the public key info in dev.bm

I'm trying to change or remove the public key I added to my user (test1) in dev.bitmask but every time I get the same error: "We're sorry, but something went wrong."

I'm assigning this to platform because Jessi confirms that this works in her local installation, but I'm not sure where the problem actually is.

(from redmine: created on 2013-04-23, closed on 2013-04-26, relates #2298 (closed))