I had a few problems with Tensee v1 and v2 and my old laptop IBM T23 (PentiumIII), whose built-in USB controller is neither OHCI nor EHCI but rather a weird UHCI chip. All boards with Intel PCI chipsets like intel 430TX, 440FX, 440LX, 440BX, i810, i820 and all VIA PCI chipsets like VIA VP2, VP3, MVP3, Apollo Pro, Apollo Pro II or Apollo Pro 133 and LEON/GRLIB SoCs with the GRUSBHC controller, they all conform to this UHCI standard, and they all failed the same way with my Tensee v1 and v2.
Dunno why, but I tried several Linux kernel from 2.6.23 to 2.6.39, and I was so frustrated to see random errors and disconnections from the Tensee that I added a PCMCIA-USB EHCI card in a free slot of my old laptop and it sorted it out. My conclusion is that probably the problem was hardware, or firmware on the Tensee side.
My current laboratory laptop is an IBM/Lenovo X61S (intel core duo dual), the USB controller is EHCI, and the Tensee v1 and v2 have never had a single problem with it!