When you export a report to PDF, and the report uses the Calibri font, extra characters may be inserted in the output. For example, an "i" may be inserted after every lower-case "t".
This problem is caused by a missing DLL in the Crystal Reports runtime components used by Report Commander. See SAP Knowledge Base article 1547961 for more information.
Download usp10.zip and extract the "usp10.dll" file to the following location:
C:\Program Files (x86)\Business Objects\BusinessObjects Enterprise 12.0\win32_x86
The report should now export correctly.