Lead developer of the Bitcoin open source project Gavin Andresen (@GavinAndresen) describes the vulnerability that prompted an updated version of the Bitcoin.org client for Windows and to make an urgent appeal that all Windows users upgrade immediately. Excerpts:
"A major bug in Bitcoin-Qt on Windows went unnoticed for over four months".
"The other reason this bug went unnoticed for so long is because it almost never matters."
"Has it already been exploited? We don’t know. We think it would be extremely difficult to craft a usable exploit, […]".
- http://bit.ly/AgSiOA (Gavin’s blog post)