Has anyone else ecperienced this problem:

I use clip volume to fade in and out. When I export to mpeg, avi or even if I just render I find that my resulting file fades in audio when I told it to, but doesn't fade it out, when I told it to. Stranger still I go back to my timeline and Press play and the same occurs even though it chows it fading out in efect controls. It is only when I move the transition or adjust it in anyway that it does what it should be doing- fading out.However, instead of adjusting them all( 'cause there are a lot of them) I just reload my project and they all work fine again until I render/export. I suspect this isn't just limited to the volume control. I've tried a number of things to get it to work, all which have failed. On the up side, if I use track volume instead of clip volume , to fade out, all works well.

any ideas anyone?