When exporting a space to HTML with pages containing double quotes in the title, I get the error below. Replacing the double quotes with single quotes works around the problem.

Apparently the same issue occured in the past with PDF space export, and was solved (see CONF-1719).

Cause:
com.atlassian.confluence.importexport.ImportExportException: java.io.FileNotFoundException: C:\Apps_CONFDATA_\temp\export_09062006_163603\name\Example "Edit lithology".html (The filename, directory name, or volume label syntax is incorrect) at com.atlassian.confluence.importexport.impl.HtmlExporter.doExportEntity(HtmlExporter.java:184)
caused by: java.io.FileNotFoundException: C:\Apps_CONFDATA_\temp\export_09062006_163603\name\Example "Edit lithology".html (The filename, directory name, or volume label syntax is incorrect) at java.io.FileOutputStream.open(Native Method)