[Update: Spiegl Online reports (in German!) that the total may be as high as 50 million infected machines: however, this figure seems to be extrapolated from the number of infections picked up Panda's online scanner. Statistically, I'm not sure it makes any sense at all to try to correlate this self-selecting sample to the total population of
Lots of fuss about the paper presented at the Chaos Communication Congress in Berlin yesterday by Alexander Sotirov et al. The paper describes a proof-of-concept attack using a weakness in the MD5 cryptographic hash function to create a rogue Cerification Authority certificate using a hash collision (essentially, two messages with the same MD5 hash value).