Problems with updates :S

[iris_9018]

Here is something strange:
In my avast! Antivirus puts that the database is the day Oct. 18 (They have already spent two days, I find it too long without updating the database ...), while the Web makes it the latest update of the database was the Oct. 16!

What happens?

Thank you

[RejZoR]

Sometimes they don't update the webpage (usually over the weekend) even though they actually release the VPS update.
Last VPS is indeed from 18th October 2008.