The technical team at Cam4 suddenly seem to be very busy and for a change it looks like they actually KNOW what they are doing. Two articles explain a lot of it:
http://www.xbiz.com/news/196729
http://www.xbiz.com/news/195542
I suspect with access to cam4-archiver they have been able to reverse engineer HOW cam streams were being recorded and have taken steps in an attempt to mitigate this. (Frankly I am less than convinced that they even WRITE the cam streaming code for the site - I suspect it is FAR more likely that this is a purchased "bolt-on" module - but it would appear with the newly gained knowledge they have managed to tighten it's operation considerably)
The changes may have stopped external recording, but they have done NOTHING for the poor site performance, it is as buggy, constantly freezes and gets up to all the other nonsense it is famous for just as before !
Will be interesting to see IF and WHEN the changes can be circumvented.