All annotations are missing because ArgumentNullException is thrown while importing page annotations. The exception is handled and all non-annotation related pdf content is loaded successfully.

When printing a document with multiple pages, the pages that are not currently visible will be printed without content.

Document cannot be loaded because the Encrypt property is not set and is null.

The instances are kept in GeometryRenderer cache and each time the content stream is parsed new PathGeometry instances are added to GeometyRenderer store Dictionary field.

Available in R1 2017 Official Release Version.

FixedDocumentPresenter could be TemplateBound to PDFViewer's Background property.

Available in LIB version: 2016.3.1205

The PdfViewer won't load a document from PdfDocumentSource created from Uri and the ReadOnDemand option.
Here is an example: new PdfDocumentSource(new Uri("webaddress/somefile.pdf"), FormatProviderSettings.ReadOnDemand);

Available in LIB Version 2017.1.130

Decode array for image masks with DeviceGray color space is not respected, and always the default array of [0 1] is used for visualization. When the mask is encoded with [1 0], the mask is applied inversed, making the wrong pixels transparent. This may lead to images becoming invisible.

Fix available in LIB Version 2017.3.1120.

The current implementation relies on the graphic state color to be always SolidColorBrush. However, it may be other color type and InvalidCastException is thrown. This results in missing content.

Available in LIB version 2017.1.410.

NullReferenceException is thrown when importing a document with AcroForm referencing a missing object for fields collection. This is a regression as the same document will be imported without a problem in previous versions of RadPdfViewer as the AcroForm object would be entirely skipped.

When annotations have annotation flag Print they should be visualized when printing the document. Usually, Widget annotations have such flag and currently RadPdfViewer does not print them at all.

Available in LIB Version 2017.3.918.

The UserDict collection is not parsed and the procedures for the operators are unavailable. The exception is thrown while trying to read the font file of the Univers and Univers Bold fonts.

Internally, an ArgumenNullException is thrown, which results in missing content when the document is shown in RadPdfViewer.

The appearance of such invisible annotation is not imported property and the viewer is trying to recalculate it in an infinite recursion which causes the StackOverflowException.

Fix available in LIB Version 2017.3.1009.

Currently, the implementation relies on the fact that the previous cross-reference value of a stream object is always a stream object. Instead during the cross-reference recursion, we should check on each step whether the previous cross-reference item is table or stream.

Fix available in LIB Version 2017.3.1120.

This may result in inversed transparency issue when rendering images with ImageMask.

Fix available in LIB Version 2017.3.1120.

For some fonts the issue is present. Some of them are:

KozGoPro-Medium

KozMinPro-Regular

KozGoPro-Bold

This exception seems to be caused because the stream is not decrypted correctly and the stream data is corrupted. For instance when the stream is with FlateDecode filter the exception is InvalidDataException with message "Unknown compression method".

This is not a valid PDF scenario as having appearance state requires having multistate appearances. However, we should handle this invalid document scenario on our side so that the app does not crash with NullReferenceException.

This is reproducible when the field VariableTextProperties has zero value for font size. 

Fix available in LIB Version 2018.1.402.

An ArgumentException is thrown internally as the font name is null. However, the name is defined in the base font and can be obtained from it.

Fix available in LIB Version 2018.1.402.