If the appearance is defined using a non-existing object reference in PDF document, NullReferenceException is thrown on import. 

This is reproducible only with specific documents which reuse big images content throughout pages.

Available in LIB Version 2018.1.205.

The issue occurs only in Silverlight and only when the glyph is filled with tiling pattern brush.

Fix available in LIB Version 2017.2.808.

You could repair the invalid file using the project from the attachment.

The fix will be available in our official release Q2 2015 SP.

Available in R1 2017 Release

The reusable Form XObject content always resets its GraphicState color property. Instead, it should take the current GraphicState color from the content stream. This may result in wrong colors.

The character is rendered with different glyph geometry and wrong glyph width which results in overlapping text.

The fix will be available in our official release 2015 Q2.

The colors are different everytime the file is opened in the viewer.

Available in R1 2017 Release

When you have a text box in a custom layer, the page presenter gets the focus and does not allow you to focus the text box.

The fix will be available in our official release 2015 Q2. 

The fix will be available in our latest LIB release (v. 2015.1.0323).

The fix will be available in our official release 2015 Q2. 

The feature is available in our latest LIB release (v. 2014.3.1103)

Do not hesitate to contact us if any issues or questions arise.

There will be a workaround for this issue for 2013 Q3 SP1. The CompressImages property of the ExtensibilityManager needs to be set to false, which will resolve the issue but the images won't be compressed.