Prior to SP3, when a clip was transferred into tether that qualifies for a proxy, you would see Pending Render in the Library. When you went to load that clip to the desktop IFFS would prompt to render the proxy. Confirm, and all is good. Now in SP3, when you load such a clip, there is no Proxy Render confirm and the desktop tools don't allow you to do anything with that clip as it warns "this clip is still being rendered". You are unable to manually Regenerate Proxy, take out 3:2 or even run it thru CC.