DV camera by Firewire not working with Seesmic (or with Flash in general...)

WARNING: it appears this problem is not specific to Seesmic, but rather has something to do with Flash Player - I'm posting it here because you guys might be able to do something oin configuring the Flash part of the app, and also because Seesmic is the only place I want to use this feature!

I have a miniDV camera (Panasonic NV-GS27) which I connect to my notebook by Firewire. I can use this camera just fine to record into Windows Media Player or Adobe Premiere. However, I cannot use it to record video in Seesmic - it is listed in the drop-down selection list, but selecting freezes the recording area for a while and then just show black and no record button. I have tested this with Firefox 3 betas 3, 4 and 5, IE 7 and 8 and Flock 1.1. Flash version is 9.0 r115.

In researching this, I have found the following links that might be relevant to developers (they weren't to me.....):

http://www.waldosmeets.com/2004/01/08...
http://www.adobe.com/go/tn_16434

Anyone else with problems like this? I'd love to use my external DV camera with Seesmic, it would be so much better... I have chatted with other Seesmic users about this, and other people seem to use their DV cameras normally. Is this specific to my camera, or to a version of some of the pieces of software on my machine?
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