版本历史：
2.10.2 (released 2008-04-30)
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- Automatically subset any possible OpenType fonts when flattening a form.
- Fixed occasional bug when encrypting documents - under some circumstances a corrupt PDF could be created.
- Importing some types of FDF resulted in a corrupt PDF - fixed.
- Fixed exception when a FormTextButton Widget has a null value.
- Added ability to set/clear "DoNotSpellCheck" flag on FormText fields.
- Fixed parsing of some BMP images that were broken in 2.10.
- Fixed Exception thrown when incorrectly merging PDF's with form fields - a PG1 warning is displayed, as was the case prior to 2.10.
- Removed public finalize methods - these should have been protected.
- Cache inline images, to speed up rendering pages containing Type3 fonts.
- Fixed rendering problems with colours containing alpha values, and finally worked around the Java bug causing "blueing" of white colors in calibrated RGB colorspaces.
- Added setInkBleed method to BarCode class, to handle print processes that distort the size of the bar.
- Fixed turning off Checkbox annotations with XFA
- Fixed appearance of StrikeOut annotations
- Handle buggy PDFs created by Actuate PDF Converter 1.0 and Ad Lib's "EX317".
- Improved CJK font substitution in Debian-based Linux.
- Viewer: the Thumbnail panel can be used to reorder the PDF or merge pages from other PDFs, directly from the viewer or by dragging PDF or image files into the panel.
- Viewer: new features can be added to the viewer automatically by specifying the "org.faceless.pdf2.viewer2.ViewerFeature" service in the Jar.
- Viewer: added mnemonics to the menu items.
- Viewer: bitmap images can now be imported directly into the PDF viewer, due to the new generic Importer/Exporter framework.
- Viewer: various smaller improvements:
- Ability to drag the URL of a PDF onto the viewer to load
- Improvements to LookAndFeel in GTK+, Metal and Motif.
