The standard fonts listed at http://docs.telerik.com/devtools/wpf/controls/radpdfprocessing/concepts/fonts#standard-fonts cannot be embedded in a document. Using one of them prevents the document from complying with PDF/A standard.

PdfProcessing: ArgumentException is thrown when importing a document with a duplicated filed names.

Manually set form field values are not preserved when opened in Adobe Acrobat.

Implement GetColor method for IndexedColorSpaceObject.

When exporting a PDF page to an image with the SkiaImageFormatProvider the following error occurs: 

System.IndexOutOfRangeException: 'Index was outside the bounds of the array.'

Missing spaces from TextFragments when exporting to plain text.

Error message: 

System.InvalidCastException: 'Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Forms.FormFieldsTree' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfArray'.'

Specific TextFragments that are positioned a little further from the previous text are incorrectly recognized as word start by the text recognizer engine and result in additional white spaces in the exported text.  

InvalidCastException is thrown due to incorrectly parsed stream dictionary.

Import-export changes the color of the shading object.

Add support for "AcroSendMail:SendMail" named action.

Such a document can be considered as invalid. However, it would be good to provide functionality to handle it.  

Wrong font loading when FontFile2 is CFF (Compact Font Format).

Implement functionality to support scenario when a document which already has a signature to be signed again or add two or more signatures.

ArgumentOutOfRangeException is thrown when creating a CapPathRound for an SVG element.

Exporting a specific PDF file generates large amounts of ExtGState entries, which results in large file sizes.

Example: 
 

Handle the import of documents with Associated Files (/AF) elements whose content is set to null.

Handle the import of documents with null elements in the Associated Files (/AF) collection.