These also seem like good reasons not to use proprietary/closed source solutions. At least with cryptocat everyone know knows about the security issues now and

These also seem like good reasons not to use proprietary/closed source solutions. At least with cryptocat everyone know knows about the security issues now and take precautions as if their entire encrypted communications have been compromised. With proprietary solutions you have to rely on an honor system where you hope the vendor tells you there is an issue.