I have a diagram with about 45 custom image objects contained within it. When I export the diagram to a png using RadDiagram.Export("PNG") there are 3 images that are not rendered in the image.

When MainView.xaml is opened, the designer throws NullReferenceException because the SelectedOutlookSection is not initialized.

Workaround: If SelectedOutlookSection is null, then initialize it to point to the first item from the collection of outlook sections:

public OutlookSection SelectedOutlookSection
{
    get
    {
        if (this._selectedOutlookSection == null)
        {
            this._selectedOutlookSection = this.OutlookSections.FirstOrDefault();
        }

        return this._selectedOutlookSection;
    }
  ...
}

The fix is available in R1 2017 SP1.

Currently if a column is bound to a field of type DateTimeOffSet it is not displayed using the culture like DateTime is. It would be nice if this is supported in the future

When setting IsSynchronizedWithCurrentItem to true, the RadListBox behaves differently from the standard ListBox; changing the selection in the RadListBox does not update the current item of the underlying ICollectionView.

Glyphs overview: http://docs.telerik.com/devtools/wpf/styling-and-appearance/glyphs/common-styles-appearance-glyphs-overview 

Available in 2017 R2 Official Release.

Add a property to the RadWindow, to enable a behavior, so that when the user attempts to focus on the parent window (while the modal is open), the modal window will flash.

You can see this behavior in other Windows applications that show modal dialogs.

One requires to create QueryableCollectionView on the UI thread.
Now there's going to be a .Count() call on the IQueryable passed into the constructor,
which will block the UI thread until it returns.
There might be various reasons why there is delay (unable to connect to DB,slow query, using a REST queryable provider, etc).

It would be nice if we could pass in the count ourselves.

Make the internal static class Telerik.Windows.Controls.WeakEventHandlerManager public.

In Excel it's easy to rotate the contents of a cell. In the Gridview, it's possible to rotate the contents of the header, but the result is a column header that resizes weirdly, and the workaround (at least the one I was provided) is clunky. How about a simple property like <telerik:GridViewDataColumn Header="Name" HeaderRotation="-90" /> 

For more details check here: http://jeremybytes.blogspot.com/2014/10/using-callermembername-attribute-for.html

Available in the R1 2017 SP1 Release.

We have a zip file created with the ZipLibrary.
It is not possible to extract it with the "Compressed Folder Tools" tool from the "Windows Explorer" application, which is the default compress tool in Windows 8.
The result is an error saying that the zip file is invalid.

Video (wmv) and Audio (wav) files aren't properly compressed. The zip file that the library creates is larger than the original media file.

The exception occurs when files larger than 1 GB are being added to ZipPackage

In some cases the ZipArchive requires to use the Flush method for its stream. When the stream like the MS.Internal.InternalMemoryStream does not support it then it causes the NotSupportedException.

When you create a ZipPackage and then use the Add method to add a .dll file the created archive is corrupted.

Incorrect output when creating an archive from a json file (when the text in the file is too long).

When used to zip files which names contains special characters(such as swedish special characters) the filename is displayed with wrong encoding after unzipping the file.

The fix is available in our latest LIB release (v. 2015.1.0323).

When operation stream is created on top of the stream which doesn't support seeking the NullReferenceException is thrown from the constructor. There are other things which makes impossible using of the ZIP library on the stream which doesn't support seeking. We should fix these things.

When certain files are added to ZipPackage IndexOutOfRangeException is thrown.