Unable to build virtualbox-ose after latest round up updates

[Warren Block]

On Sat, 25 Apr 2015, Kevin Oberman wrote:

> After doing all of the updates yesterday and today, mostly due to the icu
> shareable version bump,  virtualbox no longer starts.It finds a symbol in a
> library from qt4-gui missing.
>
> I reinstalled qt4-gui and tried rebuilding virtualbox-ose, but the rebuild
> fails with:
...
> Any idea how to deal with this? Is anyone else seeing this?
>
> Running 10-Stable r281259 with almost all ports up to date except chromium
> (which should have nothing to do with this issue).
>
> I really need to get my Windows 7 VM running again.

No problems after the update here.  I followed the procedure in 
/usr/ports/UPDATING, nothing else, and am on amd64 r281985.