As many have already said, it is related to KB3102429 and the fonts it installs.
Our testing showed the following OS systems as relates to this update:
Win 7.1 Pro (it is an Optional update)
Win 8 (Important)
Win 8.1 Pro (Optional)
Win 2008 (Didn't see it available as an update)
Win 2008 R2 (Optional)
Win 2012 (Optional)
Win 2012 R2 (Optional)
Also, from Microsoft's link on this update: https://support.microsoft.com/en-us/kb/3102429
They say:
"Known issues in this update
Microsoft .NET Framework C# applications that were developed in Microsoft Visual Studio 2010 or Microsoft Visual Studio 2008 and that use SAP Crystal Reports to create reports from raw data generate Crystal Reports error messages.
In Crystal Reports version 9 (Crystal 9) and version 10 (Crystal 10), the "export as PDF" functionality fails."
They don't mention CR11 at all. From what I've heard here and elsewhere, CR11R2 might be the way to go for those of us that use CR9 or CR10. There was a similar problem with Times New Roman fonts a couple of years ago, and a few people back then said CR11R2 didn't have this issue.
I'd really like to know for certain if CR11R2 never has this problem, as we would consider migrating from CR10 to CR11R2, for who knows when MS will release a security update that causes this issue.
Hope this helps.
Doug