My "f" was improved, but the whole font looked degraded, as if it had been through a fax machine.
This could be a hinting problem. Check, what happens, if you deactivate the options "Generating OpenType & TrueType – ttf / otf – Autohint unhinted glyphs (two times present)" and "Opening OpenType & TrueType – Autohint". Activate the option "Store TrueType native hinting". And don’t change the flavor (PostScript to TrueType or the other way around).
The rest is probably a naming problem. Read
http://forum.fontlab.com/fontlab-studio-tips-and-tricks/font-family-naming-in-fontlab-studio-5-t313.0.html.