I have been having a hard time switching from default color schemes on a number of themes I have tried to install.
I have installed Mayo, Pixture & Bartik and I get an error message when changing off the default scheme.
I contacted the host provider, who took a look and didn't find anything wrong with permissions. Also looked at the htaccess file and the SymLinksIfOwnerMatch option, to no avail.
Error message returned is:
[Mon Mar 12 10:16:39 2012] [error] [client 220.127.116.11] Premature end of script headers: index.php, referer: http://area2.temp.sentex.ca/admin/appearance/settings/mayo