Hi,
there was a FUD war at the time of publishing of that KB, but I'm sure not all backup software are affected. Veeam for example is not affected, and they explained why in a post in reply to Symantec:
http://www.veeam.com/blog/symantec-admits-all-its-vmware-backup-customers-are-in-danger.html
I'm not aware of other third party solutions that were able to workaround the problem, they may be.
Luca.