*grumble* TiVo *grumble* UK support of the old S1 units is even worse now. They've changed some things at the server end and suggestions no longer work and there isn't a fix.

On S1 units, actual show recordings use a TiVo server generated ID. However, suggestions on a S1 use an ID generated by Tribune Media Services who provide the guide data to TiVo. They've extended the length of the ID because they were running out of available IDs. S1 units don't like this and they won't provide a fix because of the amount of work required to upgrade the old 2.5 software.