epub export - letters cut off in right margin

When I upload my epub file to B&N for the Nook, some readers are complaining that some letters are cut off of words in the right hand margin. When I preview my content with their software, I did find one instance of this happening. The word “feet” was truncated to “fe”. It should have wrapped down to the next line.

Has anyone else experienced this? Is there anyway in Scrivener to correct this or is it a Nook problem?

Thank you,