I have a weird problem here. In a PDF i converted a document where the bullet in the HelveticaNeue LT Pro is shown as a 'n instead of a bullet in the PDF. It's like the encoding has gone wrong somehow.
I used Acrobat 1.4 converter.
I use Indesign CS5
Sounds like it's not embedding the font in the PDF and substituting the font - where "n" would be a bullet in the font - when substituted to another font it would be just an "n".
I actually can't find this font in the Helevetica suite, which makes me think it was a free font or something that was created to match the Helvetica fonts - but it lacks proper encoding information for embedding in a PDF.
Do you have the license to check if embedding is permitted?
If it's not I suggest finding an identical bullet from a font that does allow embedding.
Is this an automatic bullet, or a typed bullet? If it's type, select it and check to see waht font is really applied to it. If it's automatic, go to the dialog to find out. It does sound like a font not embedding.