[sane-devel] Sane Backends 1.0.19 breaks Microtek Scanmaker 4800

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I have a dual boot system with both Gentoo & FreeBSD. When sane-backends
got upgraded on both, sane stopped working. It seems to be a permissions
error. Here are the results on FreeBSD, they are identical on linux:

root at beastie ~ # sane-find-scanner -q
found USB scanner (vendor=0x05da, product=0x30cf) at
libusb:/dev/usb0:/dev/ugen0

root at beastie ~ # scanimage -L
device `sm3840:libusb:/dev/usb0:/dev/ugen0' is a Microtek ScanMaker 4800
flatbed scanner

root at beastie ~ # ls -la /dev/ugen0
crw-rw---- 1 root operator 0, 83 Mar 7 21:22 /dev/ugen0


root at beastie ~ # scanimage --format tiff > test.tiff
scanimage: open of device sm3840:libusb:/dev/usb0:/dev/ugen0 failed:
Access to resource has been denied

Now when I force a downgrade to 1.0.18 everything works as intended.
Since I experience this on both FreeBSD and Linux I would have to assume
that it is a bug in the new version of the backend.