What device(s) can inject?
You need an rtl8187 or an rt73 device to inject under KisMAC; please discuss on the forums to confirm functionality on any architecture and OS combination. rt2570 is proving to be less stable right now and it is still in progress. Prism2 injection is temporarily broken from the merge process but will be restored as soon as possible. Prism2 owners should stick with r279 for now.
Devices are irrelevant: chipsets are all that matter. You need an rtl8187 or an rt73 device to inject under KisMAC. rt2570 is less stable right now and it is still in progress. Prism2 injection has been somewhat broken and is not likely to change because of the age and limited usability of the chipset; Prism2 owners must stick with r279.