Same problem here,
Just bought the V Collection, installed all synths on MacBook Pro Intel, OS Tiger 10.4.10 without problems,installed the updates from the Arturia site, in Prophet's case it was 1.1.
All synths work in stand alone mode, including Prophet V
All work as VST's within Cubase 4 except Prophet V.
-Reinstalled it 3 times, Can't select it in Devices/PlugIn Information as it is
not listed
-Tried the Update function, checked the VST2x PlugIns Path,added the
path several times, restarted Cubase 4, reapplied the Update, still No
Prophet!
-Checked the Library/Audio/PlugIns/VST folder and all pugins are there,
including Prophet V, So why does it not work?
-Few days ago updated to Cubase 4.1, made no difference as it is a
Prophet problem.
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Contacted Arturia support, after 1 week I got an email asking to check all the folders for the plug ins, sent screen shots for all, now another week gone without any news.
Rang Digital Village UK yesterday, that guy said his "works"! OK, what Mac? G5, well I don't have that, so they put me onto Arbiter, the UK agent.
Very helpful guy there but could not suggest anything I did not already do.
Would be nice to have some acknowledgement about this common problem and a fix statement.
Meanwhile Cubase advanced to 4.1, Leopard is out there, will Arturia's products ever keep up?
I certainly hope so, will post back any answer I get.