Has update, but not going to release it to the web.

I wrote back in December 2008, that the HP Universal Print Driver (UPD):

Oh, and UPD 4.7.0 has issues with Citrix.  Namely CPU spiking and StressPrinters test issues.  HP know this and acknowledge it.  The fix (UPD 4.7.2) will be out in March 2009.
– Still a pack of cheap bastards

And so it has appeared.  But only if you ask HP directly, it’s not available on the website.

If you are using a HP Universal Print Driver with any of the following:

• 32-bit Vista.
• Crystal Reports.
• a non-admin user.
• Citrix
• a HP 5000 series printer

then you’ll be wanting UPD 4.7.2, which is available only via request from HP.