** This issue is addressed in ArcGIS 9.0 Service Pack 2 (SP2) **Symbol fonts in a text element crash ArcMap on export to PDF.
This is a known issue.
The glyph selector and Unicode input fields do not work correctly with Symbol fonts.
** This issue is addressed in ArcGIS 9.0 Service Pack 2 (SP2).
Click on the link in Related Information below and download Service Pack 2, if necessary. **