I am not sure if this is the correct place to post this, but here it goes.
I just replaced some older 10/100 switches with SG 102-24 switches. I actually had a couple of SR2024c's too, which are basically the older model of this same switch. When I install the SG switches, at least half of the connections will not negotiate and get a connection. The SR2024 works just fine on the same connections. It seems that the biggest issue is with 10/100 devices. 1000mb devices seem to link just fine. I have 9 of these switches and 4 of the SR series ones, and all 9 of the SG ones have this issue.