Do you have several Helvetica Neue installed which could cause a conflict?
What are your PDF settings? What is the purpose for this PDF? To be printed? Online-Reading on screen only?
Don't trust Apple Preview as it is used in your Safari, Preview is not a trustworthy PDF viewer as it supports only a subselection of PDF standards.
I had the fonts of Helvetica Neue bold light etc which created by Adobe and the font was created in 1993,shown in font property.
my PDF output is set to interactive not the print one. Other settings are default.
the purpose of this PDF is for user to print out and read on website. The funny thing is print out had no problem at all with HP and Ricoh printer using PCL 6 driver.
Despite Safari, the strange font happened in only Adobe product, other PDF reader had no problem such as foxit reader, xchange reader.
I tried to not embed the font but not able to do indesign, search in Google, it said it always embedded. Also that font family is preloaded in Mac OS.
I can try any test if there is a way to find out the solution.
or what should I do so the PDF should display correctly in all computer
thanks a lot.
I think you need to replace your copy of Helvetica Neue. 1993 is over twenty years ago. I think it's probably a defect in your old copy.
I will try and led you know if I can buy the fonts.
But how can I explain why it can display correctly in the newly clean installed Mac OS 10.9 and Win XP/7/8.1 with latest version of Adobe Reader?(I can't erase the iMac had problem to display and the Win XP with adobe Acrobat)
As it involved cost sorry about asking annoying question.
There's no real easy answers with this kind of question. None of us have the font you do. It's probably a subtle bug that maybe only shows up in certain circumstances.
Thanks Steve, if I upload the fonts, it seems I will violate the license agreement. I will try with your suggestion on using another font producer first.
Sorry I can't find the edit reply button. Just changed from Helvetica Neue "Regular" to Helvetica Neue "Medium" in the font list. All problem "solved".