I just got this message from
Skype about a security update:

Apart from the stray non-printable control char after the question mark, this is pretty much the way security update notices should go out for consumer applications.
The security fix only works if people download and run the update, and if the message can't be read by the intended audience because it is deep in techno-babble your patch is all for zip.
It reminds me of way-back-when comparing
iptables on Linux 2.4 vs.
IPF in OpenBSD 2.x. The one factor that made OpenBSD more secure for me in this case was the rules were written in words the config file rather than as parameters to iptables making them less error prone and hence more secure. I believe both those tools are now left to history now anyway...
Anyway, well done Skype

(NB:
They also blog