Pages with special characters in page title is exported with UTF-8 character encoding (%C3%A4 for ä), and not pageID, which breaks Microsoft Compiled HTML Help

Issue

Space HTML exports from Confluence are used by some of our customers to be viewed offline by compiling them into .CHM files, see: http://en.wikipedia.org/wiki/Microsoft_Compiled_HTML_Help

Space HTML exports prior to Confluence 4.0 used to name pages with special characters as their pageIDs, and does not convert the special characters into UTF-8 representation.

Prior 4.0:

Page title in Confluence: test_ä_test
Page title after export: 32788.html

4.0:

Page title in Confluence: test_ä_test
Page title after export: test_%C3%A4_test.html

HTMLHelp seems to break with the % characters.