The loader works OK, here's the log :
[madcat@colibri r5u87x]$sudo ./loader --force-clear Searching for device... Found camera : 05ca:183a Firmware : ucode/r5u87x-05ca-183a.fw
Reset microcode. Camera reports negative microcode state. Sending microcode to camera... Enabled microcode. Camera reports microcode version 0x0111.
Successfully uploaded firmware to device 05ca:183a!
MPlayer and TvTime will refuse to play the webcam (but I guess it's normal), skype will work but I get a weird image, as if the camera wasn't focused, you can see a screenshot here : http://maison.mymadcat.com/~madcat/ecran.jpg
Maybe it's a uvcvideo problem ?