PDF fonts not visible properly

I am using ghostscript 8.63 to split the pdf document as individual pages. Problem is for some pdf's in the splitted pdf document fonts are overlapped (black patches). observed for verdana-bold fonts text.

I copied all the fonts required for gostscript to -sFontPath 开发者_JAVA百科directory, and ghostscript also opening the verdana, verdana-bold font files but in splitted file fonts are not proper.

Don't use version 8.63. That's more than 2 years old already.

The most recent version is 8.71.

In between the two releases a lot of improvements and bugfixes have happened, especially in relation to PDF input file processing and PDF outputting (and both of these features are used when you use Ghostscript to split PDFs into individual pages).