Helvetica 65 medium previewing and publishing bold in SL 3
I opened a SL2 story in SL3 (and backed up the SL2 version), did a few edits and then previewed. The original used Helvetica 65 medium font (client's request) thorughout. In SL2, the font publishes as intended. In SL3, the font previews and publishes larger and in heavy bold.
I've seen other issues similarly throughout the boards for different fonts, but nothing on Helvetica 65 medium. Is this a bug, or is this the way SL3 is going to handle this and other fonts when importing from previous versions of SL?
Thank you for any input.