> So I don't think the bug is at Libreoffice, but at the gvfs layer instead
I don't think so. Our customer working on Windows (no gvfs) reports the same problem for Libre Office 4.1.3.2. The Windows version of Libre Office cannot open a proper https:// webdav link, that is accessible on the same machine from other application (like web browser). We give the direct https:// link to the libre office command line, from the webdav server served by our application, there are no other layers involved. Everything was working by years, but not after LO upgrade to >= 4 version.
> So I don't think the bug is at Libreoffice, but at the gvfs layer instead
I don't think so. Our customer working on Windows (no gvfs) reports the same problem for Libre Office 4.1.3.2. The Windows version of Libre Office cannot open a proper https:// webdav link, that is accessible on the same machine from other application (like web browser). We give the direct https:// link to the libre office command line, from the webdav server served by our application, there are no other layers involved. Everything was working by years, but not after LO upgrade to >= 4 version.