ls gives the following error:
ls: cannot access /mnt/Winbugs: Transport endpoint is not connected
The problem is resolved in the version 2.9.2 fuse, what it will take a while to get to Ubuntu. But the Debian Sid package works perfectly:
wget http://ftp.mx.debian.org/debian/pool/main/f/fuse/fuse_2.9.2-2_amd64.deb http://ftp.mx.debian.org/debian/pool/main/f/fuse/libfuse2_2.9.2-2_amd64.deb
dpkg -i *fuse*.deb
(If your processor is not 64 bits, replace amd64 with i386 or your appropriate architecture)