Somehow flash just stopped working in SeaMonkey. It has version 220.127.116.111 which is relatively recent, and was working until a few days ago (I do not know exactly when it stopped working.)
Firefox gets its version from /usr/lib/flashplugin-installer/libflashplayer.so and that one works just fine. However, if I try to use that version with SeaMonkey, it doesn't even get detected...
Also, I clicked on the link
Find updates for installed plugins at mozilla.com/plugincheck
and the plugin is shown as current / valid.
Any idea what would be happening?