Implement importing and exporting the javascript actions associated with push button fields so that they can be executed when the exported document is opened with Adobe Acrobat. Javascript actions are also used by text fields for text validation (for instance for date input).

When Separation color space with "name" set as None it is falling back to an "alternateSpace" (color space) instead.

From the Pdf specification:
A Separation color space is defined as follows:
[ /Separation name alternateSpace tintTransform ]

Observed:

The None value is ignored and the color space fallbacks to the Lab color space.

Typically, it is the text to be displayed for the annotation or, if the annotation does not display text, an alternate description of the annotation’s contents in human-readable form.

This item will be closed as its subject is too broad. Please refer to the information below for the individual markup annotations.

As of now, the currently supported markup annotations are:

Text
Line
Highlight
Underline
Squiggly
StrikeOut
Stamp

The unsupported annotations and their respective feedback items are:

FreeText
Square
Circle
Polygon
PolyLine
Caret
Ink
FileAttachment
Sound

PdfStreamWriter: "InvalidOperationException: 'isContentReleased'" is thrown when creating a multi-page document with an umlaut on the last page.

block.TextProperties.Font = FontsRepository.Courier;

To bring RadPDFProcessing to the next level you should support XMP metadata. This would extremely help to use pdf files from RadPDFProcessing in digital workflows.

Reference: http://www.adobe.com/devnet/xmp.html

Support for FileAttachment annotations. 

A file attachment annotation contains a reference to a file, which typically is embedded in the PDF file.