While connected to my PC, it recognizes my phone just fine as long as the Android OS is running. But once in AP Fastboot Mode, it won't switch to USB Transfer Mode while plugged in. I ultimately had to use another computer (my brother's laptop) and it worked just fine on there. Coincidentally my brother's phone, which is also a Bionic, goes into USB Transfer Mode when plugged into my PC.
Anyone had issues like this? And is there a way to fix it? It's not a huge ordeal, but it IS a nuisance.