The current page changes too late, almost when the whole page is out of the view. This behavior is wrong making the page number showing the previous page when actually a new one is in the view. It should change when the second page visible height is higher than the current page visible height.

The offset of the CropBox is not respected and is always treated as 0.

Workaround: Import the document with PdfProcessing, change the CropBox offsets of the pages to 0, export the modified document and then import it in PdfViewer.

Right now an exception is not raised for gruop3 2d encoding.

When RadPdfViewer is created on UI thread different than the Application main thread, an InvalidOperationException: 'The calling thread cannot access this object because a different thread owns it.' is thrown when calling the Copy method.

Use the attached project to reproduce. 

Workaround:

var combo = toolbar.ChildrenOfType<PercentComboBox>().FirstOrDefault();

var binding = new System.Windows.Data.Binding();
binding.Path = new System.Windows.PropertyPath("ScaleFactor");
binding.Mode = System.Windows.Data.BindingMode.TwoWay;
binding.Source = pdfViewer;
binding.UpdateSourceTrigger = System.Windows.Data.UpdateSourceTrigger.PropertyChanged;
BindingOperations.SetBinding(combo, PercentComboBox.ValueProperty, binding);

var binding1 = new System.Windows.Data.Binding();
binding1.Source = pdfViewer;
BindingOperations.SetBinding(combo, PercentComboBox.RadPdfViewerProperty, binding);

When importing the document as DocumentSource the stream will be loaded asynchronously and the document won't be loaded when the Print() method is called, NullReferenceException is thrown.

When saving Form Fields in document defined with linearized PDF structure, it produces a document that fails to open in Edge.

The current implementation of the RadPdfViewer Save uses the incremental update feature. However, the incremental update doesn't comply with the linearized structure and the document fails to open in some viewers.

Workaround: Import/export the document with PdfPRocessing to remove the linearization feature.

User is not able to type in the form fields on touch devices.

OutOfMemoryException has thrown when creating a thumbnail with the ThumbnailFactory.

This behavior is observed with binaries version 2020.2.513 or later.

After saving a document from PdfViewer, it cannot be opened by other applications as it is still locked.

Importing a document, which contains pages with many geometries - such as paths, lines, and curves leads to degraded scrolling performance.

When importing a document containing an ICCBased color space an exception is thrown.

PdfViewer: Show the DropDownList icon when the document contains ComboBox field

When importing a document containing an image with ICC Based colorspace and the Alternate colorspace property is null, a NullReferenceException is thrown, which leads to a missing image in RadPdfViewer.

In specific occasions, when starting multiple background threads to import documents, an InvalidOperationException might be thrown saying "Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct." This issue is pretty hard to reproduce. 

Exception when the inline image stream starts on a new row (No imaging component suitable to complete this operation was found).

Introduce a fallback mechanism for glyphs that cannot be found in the current font 

When importing a document containing two trailers and the encryption object (Encrypt) is part of the fist xref table the document is not successfully decrypted and an exception is thrown.

When importing a document containing Outlines (Bookmarks) containing Actions with an empty dictionary:

leads to an exception thrown: System.MissingMethodException: 'Cannot create an abstract class.'

When importing documents with Type 3 fonts and loading them in RadPdfViewer an ObjectDisposedException is thrown leading to blank pages.