For those who’ve recently been seeing this message with vexing frequency in Google Reader with our extension installed, we’ve updated the extension version, so installing it will make the fish message go away: update Google Reader extension.
Apologies for any annoyance, though in good news the appearance of the fish did help us figure out the source of an issue, so there was some benefit to the experiment. (Though there was discussion about the value of an error message that actually makes sense and whether or not people would still tell us if that had popped up instead…)