This happens with either of the two rfbees I have, with only one plugged in. The receivedata() I am getting a size of 0, returned from CCx.Read() call at the top. I am in mode 2, ATMD2, at the moment, but I just tried both devices at mode 0 and no change.
I inserted a CCx.ReadSetup() after the CCx.Read call if the size is zero, and I got the following list. Not sure if it is useful, but I thought it might enlighten someone.
B:F
C:0
D:1E
E:C4
F:EC
10:8C
11:22
12:2
13:22
14:F8
A:0
15:47
21:56
22:10
18:4
19:76
1A:6C
1B:3
1C:40
1D:91
23:A9
24:A
25:20
26:D
29:59
2C:88
2D:31
2E:B
3:7
0:29
2:3F
7:2
8:45
9:1
6:FF