Call for Testers: VirtualBox 4.0.4

[Yuri]

Solaris-10 guest has the issue with mounting the new guest additions.
The 4.0.2 additions were installed. When I clicked on "Install Guest 
Additions" old one disappeared from the screen, new one didn't show up. 
The 4.0.2 is still under /cdrom. When I click "Install Guest Additions" 
again error message shows up:

Unable to mount the CD?DVD image /.../.../VBoxGuestAdditions_4.0.4.iso 
on gthe machine SOlaris10_9-10_1. Would you like to force mounting of 
this medium?

Could not unmount the currently mounted media/drive (VERR_PDM_MEDIA_LOCKED)

On MacOS host same Solaris10 installs new additions fine.

Yuri