Currently running 5.1 BETA 3, but noticed this same issue with beta 1 and beta 2.
I have a shared folder in my MacOS homedir that I having been using successfully with v4.x and v5.x versions of Virtualbox host with Solaris 11 and S12 (pre-release guests). Since the upgrade to 5.1 BETA, my shared folders are no longer automounting or able to be manually mounted from my Solaris guests. Is this a known issue? Am I doing something wrong? Any additonal configuration needed?
I tried removing the shared folder and recreating, logged out, logged back in, rebooted guest, nothing seems to work.
Any ideas/suggestions? Thanks!