Re: can't see certain images in Firefox
In your address bar type in "about:plugins" without the quotes, make sure there is something listed in there for flash.
If not try quiting and reopening firefox and try again.
If your using gnash to play flash that may be the problem (gnash is an opensoure implementation of adobe flash) try removing gnash and installing adobe's flash plugin.
sudo apt-get --yes purge browser-plugin-lightspark gnash-common lightspark-common browser-plugin-gnash
restart firefox and try again.
sudo apt-get install flashplugin-installer
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