Ran into a dependency problem with Ubuntu Karmic 9.10: Adobe Flash player plugin for Firefox depends on package libnspr4-dev, which apparently is problematic for one reason or another. I got the player to install by doing the following:
sudo apt-get updateWithout doing the update first, the install warned that it would remove several packages, including Firefox itself. Not very convenient.
sudo apt-get install libnspr4-dev
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