this issue is similar with similar with http://jira.atlassian.com/browse/CONF-5562 ,or same.

When i install confluence on resin 3.0.18 in my self pc (windows 2000 professional ,chinese simplified character ) , not have any problem

but when i install confluence 2.0.15 on resin 3.0.18 in my server ( redhat as4, en_US.utf-8 resin 3.0.18 and 3.0.14 , apache 2.0.55 ) ,problem occured!

maybe it is a problem of resin, and i have report a bug to resin, but they deny it . see http://bugs.caucho.com/view.php?id=667 for detail.

so i modify the AttachmentDownload class when run in resin + redhat :

requestURI = requestURI.substring(requestURI.lastIndexOf('/') + 1);

String lastURI = GeneralUtil.urlDecode(requestURI);
try

{ //only if resin + redhat as,do this lastURI = new String(lastURI.getBytes("ISO-8859-1"), GeneralUtil.getCharacterEncoding() ); }

catch(UnsupportedEncodingException e)

{ //do nothing }

after this modify,it can work well when download non-ascii attachment file.