Hi Pawel,
Thank you for your interest in Syncfusion products.
The mentioned font preservation issue has been fixed in our latest release that
is rolled out and available for download under below location. Please try
upgrading to our latest version (10.2.0.75) and let us know whether the issue
is resolved.
Download Link:
http://www.syncfusion.com/support/forums/general/103906/Essential-Studio-2012-Volume-2-Service-Pack-Release-v102075-available-for-download
Please let us know if you have any other questions.
Regards,
Deiva selvan