My transfers from PC->TiVo were not completeing under 2.6.1 and actually completely locked up my S3 and THD boxes when the transfer failed such that I had to do a hard re-start (pull the plug).
I downgraded to 2.5.1 but now cannot see any files on the PC (PC can see files on TiVo). However, Pony's link to the certificate updater now links into a generic page on the new TiVo site and searching their help for it does not turn up any results.
Does anyone have a valid link to the certificate updater?