Updated v1.6 now up on Stardock Central - Check "show pre-release versions" to be able to get at it.
Fixes various problems that the previous Beta had. While the last beta was full of new things and changes, this one marks the "settling down" of the furious additions/changes/updates so hoping we're reaching the end of this beta! Let me know how it goes.
A general shoutout by the way, thanks everyone for all the kind words about the new features / abilities, and also a great thanks for the very helpful feedback from all our testers! I'm glad the updates seem to be working out for everyone on the whole 
*For those of you seeing some mouse lagging on the prior builds, if it's still happening please try checking all the "temporarilly disable" checkboxes in the new "Troubleshooting Options" dialog, rebooting and trying again. If its gone (hopefully!) try unchecking one at a time and restarting OD+ until you do see the problem. Despite the great help I've been getting still having a very hard time pinning down why that is happening...from what I'm gathering so far it could have to do with reserving the edge of the screen but it's hard to say for sure. I should note, the edge-of-screen feature is subject to other apps actually messing with *it*...if that seems to be it for you try resizing your windows taskbar up/down once or twice with and without ObjectDock loaded and see if you see it happening at all there with/without OD / etc.
Anyways withour further adu, the new build:
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Updates since the last beta: (last week)
1.59a beta
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x-Custom icons set for program file shortcuts now automatically sync with custom icons set for windows of a program in taskbars.
x-Ability added (to be shown off in the release version) of ObjectDock to apply included default images for programs that do not have high-resolution icons already included with them. For example, a default Notepad shortcut on XP would use the included custom high-quality icon, but on Vista where a high-quality icon is available for Notepad, ObjectDock will use the actual Notepad icon.
x-New "Troubleshooting" dialog with quick access to disabling features of ObjectDock
x-Fixed various bugs that cropped up in the previous beta, including issue where top-halves of icons on docks on the top/left side of the screen would be unclickable, and where launching url-shortcuts would just launch a browser not actually open the page. Various attempts made to help solve lagging-on-startup problems some users saw.
x-Variety of little glitches fixed involving such things as autohide, drag & drop on zoomer docks, etc.
x-Increased drawing optimization code's ability to manage images. Should result in quicker than ever drawing and decreased memory usage for zooming docks.
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-Jeff Bargmann
ObjectDock Developer