Sign a random pdf document with the following code. If UseSignatureProperties=1, the produced PDF document will be corrupted and Adobe displays an error message when opening the file: 

Observed: the following dialog appears:

Fields are no longer highlighted after import. 

Represents Highlights in PDF content. While the other annotations are drawn on top of the content, the highlight annotation is behind the text it highlights. The precise place where the highlight should be placed is described in the PDF file with the BDC, MCID and EMC operators. 

They are exported with the /EmbeddedFiles switch. This would allow adding external files to the PDF document.

Wrong font file loaded when CidType2Font with Standard name.

NullReferenceException is thrown on import because the value of TransformMethod property is not obtained.

A password is asked although Adobe opens the document without one.

Unwanted Stopwatch in DocumentCatalog.

When getting the hash code of CFF (Compact Font Format) font`s UnderlineThickness and there is no such value set in the font file the default value should be returned but an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'

NullReferenceException: 'Object reference not set to an instance of an object.' is thrown on export because the value of TransformMethod property is not obtained.

When decoding a CalRgb ColorSpace image an exception is thrown: NotSupportedException: 'Not supported colorspace: CalRgb'

When exporting a document containing different font types but with the same name and properties same characters are missing or drawn as rectangles.



Observed:

Import-export mangles text with a specific document.

Expose the IsBold property of FontBase.

The table is not properly split when it is positioned at the end of the page and the text content is long.

You can convert the document to PDF and use the approach bellow:

Currently, silent async printing may be achieved by using RadPdfViewer WPF control. Sample demo showing how to achieve this may be seen at the following forum post:
http://www.telerik.com/forums/pdfviewer-print-makes-ui-unresponsive#js0YdzFWc0Oa8C3g6a18lg

The RadPdfViewer WPF control used does not need to be displayed, making this demo a good workaround for ASP.NET AJAX clients.

When characters are in the ranges 61472-61566, 61565-61695, 65535-65535 they are correctly exported with Wingdings font. However, when the character value is outside these ranges the font fallback mechanism exports them with different font and this causes wrong glyph rendering in the resulted PDF.

The following code snippet shows how the Wingdings characters can be modified so that they are correctly exported to PDF when converting from WordsProcessing's RadFlowDocument:
RadFlowDocument document = new DocxFormatProvider().Import(File.ReadAllBytes(@"test_document.docx"));
foreach (Run run in document.EnumerateChildrenOfType<Run>())
{
    if (run.FontFamily.GetActualValue(document.Theme).Source.Contains("Wingdings"))
    {
        StringBuilder modifiedText = new StringBuilder();

        foreach (char character in run.Text)
        {
            modifiedText.Append(character > 256 ? character : (char)(character + 61440));
        }

        run.Text = modifiedText.ToString();
    }
}
Workaround: When creating a RadFixedDocument:
using (RadFixedDocumentEditor editor = new RadFixedDocumentEditor(this.fixedDocument))
{
	byte[] data = File.ReadAllBytes(@"CustomFont.ttf");
	FontsRepository.RegisterFont(new FontFamily("CustomFont"), FontStyles.Normal, FontWeights.Normal, data);
	FontBase customFont;
	FontsRepository.TryCreateFont(new FontFamily("CustomFont"), FontStyles.Normal, FontWeights.Normal, out customFont);
	editor.CharacterProperties.Font = customFont;
	string text = "w";

	StringBuilder modifiedText = new StringBuilder();
	foreach (char character in text)
	{
		modifiedText.Append(character > 256 ? character : (char)(character + 61440));
	}

	text = modifiedText.ToString();

	editor.InsertRun(text);
}

Endless loop when trying to parse image data between ID and EI keywords.