I have object dock plus 1.90 and have noticed a display glitch with a multimonitor enviroment.

How to reproduce:

Vista x64
Dock bar at the bottom of my 2nd monitor.
Monitor 1 at 1280x1024 (Primary display)
Monitor 2 at 1024x768 (Positioned to the right)

If the monitors are aligned at the top everything is fine, if you align the monitors at the bottom then any manual seperators (the built in seperator between taskbar and dock is fine) are drawn as if their top position is calculated from the top of the main monitor instead of the top of the current monitor, resulting in the seperate being about 300pixels too high.  Shortcuts appear fine.