no instant preview (do I need dv2dt?)

[Neal Becker]

linux fedora 14 lyx 2.0.0beta3.  Used to have instant preview, but not anymore.

I do see "Unable to find executable from 'dv2dt'" on console.

Is dv2dt the only way to get instant preview?  Doesn't seem to be available
for fedora 14 via yum.