Opening and saving .ppt file cause changing color of image's background

Hi,
I have the sample (.ppt): sample.zip (474.1 KB), After loading and saving it, color of image’s background is changed.

My code:

using(var inputStream = new FileStream(inputPptFile, FileMode.Open,
    FileAccess.Read, FileShare.ReadWrite))
    {
    var presentation = new Presentation(inputStream );
    SaveFormat format = SaveFormat.Pps;
    presentation.Save(outputPptFile, format);
    }

Please check and give me feedback.
Thank you.

@dunghnguyen,

An issue with ID SLIDESNET-42033 has been created in our issue tracking system to further investigate the issue of background turning to black in saved PPS. We will share feedback with you as soon as the issue will be fixed.

The issues you have found earlier (filed as SLIDESNET-42033) have been fixed in this update.