This build added a number of new features over EO.Pdf 2011:

http://www.essentialobjects.com/doc/4/whatsnew.aspx

This build also contains the following bug fixes/improvements:

1. Fixed an issue where the converter did not correctly return the location for zero sized elements, such as a BR element;
2. Fixed an issue where the library could not correctly "check" or "uncheck" certain checkboxes in a PDF form;
3. Fixed an issue where the converter may incorrectly position HTML links;
4. Fixed an issue where the library could not load certain PDF files with inline images;
5. Fixed an issue where the library could not merge PDF files with bookmark items that have no target location (such as parent bookmark items);
6. Fixed an issue where the library could not read a PDF file with an unreferenced catalog object;
7. Fixed an issue where the converter would ignore background color if background image is also used;
8. Added code to address certain issues under a stricter permission environment;
9. Fixed an issue where the library would ignore fill in form from the second file when merging two PDF files both with fill in form;
10. Fixed an issue where the library won’t remove all blank pages at the end of result file if there were more than one blank pages initially;

Enjoy!