I am using Lotus Notes on Mac and we are heavily using so called teamdisks (aka smbfs shares on file.vienna.at.ibm.com) Usually we generate Notes with many attachments mixed in the text, this is part of our job.
Under (sic.) Windows, one could easily drag from an explorer window (from a share network drive) into the new LN Mail on the position wanted and drop it there.
Or one could use the file-attach function.
Under OS X the Lotus Notes seems not to support that. When dragging FROM A NETWORK share, notes errors with: “file does not exist: /Disk/312/Nachweise/testfile.pdf”).
When dragging from a LOCAL directory, everything works fine - the problem is “only” when dragging from a network share.