Here's our dilemma: We have a similar (but not) problem with our setup, here are the relevant details:
Primary: S2 300 hard wired to second router
Secondary: S2 300 with TiVo USB Wireless adapter
Tertiary: S2 300 with TiVo USB Wireless adapter
All three units have updated to 9.1-01-2-140 (unfortunately, it seems, though the updated graphic elements are pretty.)
Network: 2 Linksys WRT54GS running Tomato firmware, linked via WDS
Now, the problem: Primary's and Secondary's recordings can be seen from both other units, and Tertiary as a unit can be seen from the other two units, but when accessing Tertiary's recordings from Primary or Secondary, a navigable blank list comes up. Blank pages can be scrolled, blank items can be highlighted, but you get the bad bong when you try to select anything. I've tried every imaginable permutation of initiating calls/updates, power cycling of all/various components, and wired/wireless network connections and timings, including the above-referenced 8 steps, to no avail.
Any ideas, or do I just try and wait it out for the next service update?