With the active window in a display link managed monitor, take a screen shot of an area (Command+Control+Shift+4). Normally, this saves a jpg to your desktop, but nothing happens on my system. Take a screen shoot in another display, and you should get a file out of it.
I see no messages in the log files.
Using 1.5b3 driver, with a manually created System/Extenstions/DisplayLinkdrive.kext/DisplayLinkAgent/(DisplayLinkUserAgent & USBNivoListener).
Code:
TOSHIBA Video Dock:
Product ID: 0x0110
Vendor ID: 0x17e9 (DisplayLink (UK) Ltd.)
Version: 0.09
Serial Number: 0110-000000
Speed: Up to 480 Mb/sec
Manufacturer: DisplayLink
Location ID: 0x26221000
Current Available (mA): 500
Current Required (mA): 0