The message for when you when you didn't select somebody to talk to is a bit off. It said "Please select some someone to talk to"
Shouldn't it say "Please select someone to talk to"? This is a minor issue, and a very easy fix.
In im.js, line 58 this: alert (Drupal.t("Please select some someone to talk to"));
should be changed to this: alert (Drupal.t("Please select someone to talk to"));