Hi Siva,
1) Yes
2) All the ones we could find and/or have been reported but this is the real world and no software can be tested under every conceivable situation inside every imaginable environment.
One huge improvement that we have made though is that every member of our regional support teams now has their own ESM 2.1 server and even their home pcs are being managed by ESM so if there is a bug we will probably find it.
Regards,
Michel
Product Manager - Comodo Endpoint Security Manager