Upgraded to 9.10 now Shiretoko Flash plugin broken

[alanrlow]

Sorry if I'm in the wrong place. I've just upgraded to 9.10 and it seems the new Firefox/Shiretoko Flash plugin doesn't work. I get a message bar telling me that a missing plugin is need to display some content on the page. When I tell it to install the plugin it downloads it but fails when it tries to install it. It has been working just fine before upgrading, why has it broken now?
PS: running 32 bit version on an old Acer Aspire laptop..
Any help or ideas appreciated.

Cheers,
Alan.

[ElSlunko]

If you don't plan on using 3.6 or 3.7 of FF I'd suggest getting rid of the ppa for the ubuntu-mozilla-daily after uninstalling FF. Then reinstall FF from the software center or Synaptic, then flash from either of the two.