JDiagram version 4.1.2 contains the following new features and fixed bugs:

AnchorPatern improvements
~ The XUnit and YUnit properties allow specifying the coordinates of an AnchorPoint as a fixed offset from the node's top-left corner rather than in percentage, so that the point position does not change when the node is resized.
~ The AnchorPattern property of Shape class lets you associate anchor points with shape definitions. If a ShapeNode instance does not contain its own AnchorPattern, it will derive the one defined by the node's Shape.

Miscellaneous
~ Type of Margin property of LinkLabel has been changed from float to Thickness.
~ The changeUnit method sets a new MeasureUnit and scales the coordinates of diagram items to keep them the same size.
~ Fixed node spacing in bottom-to-top TreeLayout.
~ TabbedScrollPane allows reordering tabs when AllowTabReorder property is enabled.
~ Improved quality of print preview page images.
~ DisableTextClipping property added to PdfExporter enables work-around for limit-check errors when Adobe Reader prints to some PostScript printers.

If anyone is interested in trying the beta version, please download this archive containing the updated jar and help files:
https://mindfusion.eu/_beta/jdiag.4.1.2.zip

Any comments, questions and general feedback are welcome.