usb feedback loop problem

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Hello.

I am building a high speed usb audio device. It uses asynch isochronous mode for playback but the info from the feedback endpoint seems to get lost somewhere.

Relevant ouput from usbmon (2 lines):
f694c1c0 1057412404 S Zi:1:022:3 -115:64:3920 1 -18:0:4 4 <
f694c5c0 1057420403 C Zi:1:022:3 0:64:3984:0 1 0:0:4 0

I would assume the last line should look somewhat like this:
f694c5c0 1057420403 C Zi:1:022:3 0:64:3984:0 1 0:0:4 4 = 00000600

The feedback is all correct when I force the device to full speed.

--
thg
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