Hi,
This is not exactly a question, but a solution that worked for me. Wanted to share with community. Did not know where to post it so am posting here. Mods are free to move/remove this post.

I had done netinstall of CentOS. Whenever I tried to access this very site (Linux forums - linux articles forums downloads) the firefox would just disappear. Same was observed when I tried to access youtube. So, I thought it was something to do with flash content. I had installed adobe flash player from adobe site itself according to their instructions (adding adobe repo and then yum install flash-plugin).

Searched net and this issue was rampant with ver 1.5 of firefox. But mine is 3.0.11. In any case, the following are some of the suggestions:
1. remove libflash0c2
2. remove libflash-mozplugin
3. fixing default depth in xorg.conf to 24 if it is not
4. installing nspluginwrapper and libflashsupport
5. installing nss and curl

Chances are if we are using recent distro and/or firefox most of these things are already done.

The solution that worked for me was to install 'curl' ('nss' was already installed).

If you think this post is worth, you may add your suggestion. Mostly in the order:
distro:
packages to remove:
packages to add:
other tips/tricks:

Cheers,
saivin