Fonts in PDF display as small squares and the following exception is thrown

Jun 22, 2010 5:26:14 PM org.icepdf.core.pobjects.fonts.nfont.Font init
FINE: Error parsing cmap.
java.lang.NullPointerException
at org.icepdf.core.pobjects.filters.ChunkingInputStream.fillBufferFromInputStream(ChunkingInputStream.java:80)
at org.icepdf.core.pobjects.filters.ChunkingInputStream.fillBufferFromInputStream(ChunkingInputStream.java:74)
at org.icepdf.core.pobjects.filters.FlateDecode.fillInternalBuffer(FlateDecode.java:172)
at org.icepdf.core.pobjects.filters.ChunkingInputStream.ensureDataAvailable(ChunkingInputStream.java:102)
at org.icepdf.core.pobjects.filters.ChunkingInputStream.read(ChunkingInputStream.java:124)
at java.io.FilterInputStream.read(FilterInputStream.java:66)
at java.io.PushbackInputStream.read(PushbackInputStream.java:122)
at org.icepdf.core.pobjects.fonts.nfont.c.a.a(Unknown Source)
at org.icepdf.core.pobjects.fonts.nfont.CMap.<init>(Unknown Source)
at org.icepdf.core.pobjects.fonts.nfont.CMap.<init>(Unknown Source)
at org.icepdf.core.pobjects.fonts.nfont.Font.init(Unknown Source)
at org.icepdf.core.pobjects.Resources.getFont(Resources.java:234)
at org.icepdf.core.util.ContentParser.consume_Tf(ContentParser.java:2020)
at org.icepdf.core.util.ContentParser.parseText(ContentParser.java:1147)
at org.icepdf.core.util.ContentParser.parse(ContentParser.java:280)
at org.icepdf.core.pobjects.Page.init(Page.java:369)
at org.icepdf.core.views.swing.PageViewComponentImpl$PageInitilizer.run(PageViewComponentImpl.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)