You've posted a question to the Using FileMaker Server section, but this question does not appear to have anything to do with server...
Which version of FileMaker 12 are you using?
I can find a Known Bugs List report that describes letters getting "clipped" from the ends of text fields, but this issue was supposedly corrected with the 12.03 update.
For More Information see: Printing in FM 12 is Full of Bugs
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip