So if the problem with the 10/100 switches is not the data transfer rate, then what is it? Seems to me that if it works at 10 Mbps and doesn't at 100, then the receiver must start to have trouble at some rate in between 10 and 100.

By daisy chaining, do you mean connecting the receiver to the 10 Mbps switch and then to the wireless bridge? And wouldn't that just be a way to limiit the data transfer rate to 10 Mbps going into the receiver?