When indexing a hfyv avi file generated by the pre-rendering job, the status goes very fast to 98%, then stops for several minutes and finished without errors.
However the resulting index is broken and the loaded in avs results in the 1st 19 seconds of the video.
I've checked it with the builds from the their official site and they produce same error.
Switching back to the r683 from the stable update server, solves the issue.
Please remove the broken r706 from the update server.
I cannot report this issue to their bug tracker, I've got no account on google.