As a workaround for the problems accessing files on shares mounted under ~/.gvfs I created a symlink to .gvfs (with ln -s .gvfs gvfs-mounts). Now saving/opening works fine ( on ubuntu 11.10, LibreOffice 3.4.4 ,OOO340m1 (Build:402)). It seems part of the problem was the inability to use a path with a "hidden" directory.
As a workaround for the problems accessing files on shares mounted under ~/.gvfs I created a symlink to .gvfs (with ln -s .gvfs gvfs-mounts). Now saving/opening works fine ( on ubuntu 11.10, LibreOffice 3.4.4 ,OOO340m1 (Build:402)). It seems part of the problem was the inability to use a path with a "hidden" directory.