alright, just to make sure I understand this. each time I emerged firefox and thunderbird (cause I wanted to do a world update) I had this message. Now reading (damn those ABC books when I was little payed off) the error message in the read * area told me the libvpx wasn't installed. The odd thing is I emerged libvpx and it was version 1.0
I did the world update again and got the same problem. After that, I began to explore this forum (once again

) and found this thread. I followed what jagdpanther and it worked. My firefox (version 9 wtf ?

works).
sooo..
1. So this oneshot option in others words doesnt add libvpx0.97 in the world file. This means that later if I want to update firefox when it should work ?
2. what is that webm USE flag ? Just to be sure does it mean that if I disable that flag, I wont be able to view html5 video ?
I'm a noob, be gentle with me. TEACH ME