This fixed it for me (ACS 4.5):
- Applying the patches at packages/acs-lang/ACS4.1b-PATCHES/
- Editing <your_service>.tcl config file. The following lines may be relevant:
ns_section ns/parameters
<snip>
ns_param HackContentType 1
ns_param OutputCharset windows-1251
ns_param HttpOpenCharset windows-1251
ns_param DefaultCharset windows-1251
ns_section ns/mimetypes
<snip>
ns_param .html "text/html; charset=windows-1251"
ns_param .tcl "text/html; charset=windows-1251"
ns_param .adp "text/html; charset=windows-1251"
(replace windows-1251 with your charset, of course)
Let me know if this helps.