Saving a signed pdf to a UNC path results in this error:
To reproduce:
- Sign any pdf (doen't need to be in an UNC path)
- Save the signed pdf in an UNC path, e.g. //vboxsvr/shared/testrun/260909/test_signed-save.pdf, a virtual box shared folder, selected via "Network": => error occurs
Notes:
- Normal "Save as" (unsigned) to UNC path works fine

