it this bug is only fixed by exchangers, what about normal users? Do they still get this problem? If only exchanger can avoid this problem, the bitcoin is dead.
There's already fixes out there for clients to stop it showing unconfirmed coins on your balance. I'm sure it won't be long before they patch the reference client with a proper patch but its really just an annoyance more than anything else it just makes accounting a little bit harder / have to double check. No funds are at risk which is the main thing.
Bitcoin is a new idea / technology there's always going to be bugs and really this isn't one to really worry about the bug was known about years ago.