Hi Marc,
There are newer drivers available. These can be found through the support pages on the website. You can find these here
http://www.blackmagic-design.com/support/
You will just need to select your operating system and product from the dropdown boxes. You should then have a link for the current 9.2 driver, and to the driver archive.
However I couldn't say whether these would necessarily solve the problems you are seeing. The driver version you currently have was the last to officially support FCP6.
You can of course also call your regional support office using the numbers on the following page
http://www.blackmagic-design.com/company/
Or you can send a support request using the support form using from the support pages.
Chris Pearse
Technical Support Consultant
Blackmagic Design