Version:           3.5.7 (using KDE KDE 3.5.7)
Installed from:    Ubuntu Packages

After "Build Search Index" from khelpcenter , everything seems to be ok , the job finished , but search indexer dowsn't work, for searching : knode , it shows a non-HTML message :

There is no documentation available for /file:///usr/share/doc/kde_application_manuals.tmp/index.html.

But it should be file:///usr/share/doc/kde_application_manuals.tmp/index.html , not /file:///usr/share/doc/kde_application_manuals.tmp/index.html

Maybe the process of the indexer fails.

Another thing is , help:/KRegExpEditor works in konqueror and this is case-sensitive , but in the indexing process , looks for regexpeditor : 

Unknown host or unable to contact server: help://kregexpeditor/index.docbook Ref: file:///usr/sha
re/doc/kde_application_manuals.tmp/index.html

The whole code is attached.

Regards
Arsham