Well i tested this on a test server last night and i have to say that the default install of dolphin from the auto installer turn out these file permissions :
backup - 777
cache - 777
cache_public - 777
langs - 777
tmp - 777
/backup/.htaccess - 777
/cache/.htaccess - 777
/cache/all files 666
cache_public/all files 666
/flash/modules/board/files - 777
/flash/modules/board/xml/config.xml - 777
/flash/modules/board/xml/langs.xml - 777
/flash/modules/board/xml/skins.xml - 777
/flash/modules/board/xml/main.xml see more - 666
/flash/modules/chat/xml/config.xml - 777
/flash/modules/chat/xml/langs.xml - 777
/flash/modules/chat/xml/skins.xml - 777
/flash/modules/chat/xml/main.xml - 666
/flash/modules/desktop/xml/config.xml - 777
/flash/modules/desktop/xml/langs.xml - 777
/flash/modules/desktop/xml/skins.xml - 777
/flash/modules/desktop/xml/main.xml - 666
/langs/.htaccess - 777 hackable known security risk
/langs/lang-en.php - 666 hackable
/media/app - 777
/media/images - 777
/media/images/banners - 777
/media/images/blog - 777
/media/images/classifieds - 777
/media/images/flags - 777
/media/images/membership - 777
/media/images/profile - 777
/media/images/profile-bg - 777
/media/images/promo - 777
/media/images/smiles - 777
/media/images/.htaccess - 777 perfect eh?
/media/images/all files - 777
/media/images/banners/.htaccess - 777
/media/images/blog/.htaccess - 777
/media/images/flags/.htaccess - 777
/media/images/flags/all files - 777
/media/images/membership all files - 777
/media/images/profiles/.htaccess - 777
/media/images/profiles/all files - 777
/media/images/profile-bg/.htaccess - 777
/media/images/promo/original - 777
/media/images/promo/ all files - 777
/media/images/smiles/default - 777
/media/images/smiles/default/.htaccess - 777
/media/images/smiles/default/all files - 777
/media/images/smiles/sample - 777
/media/images/smiles/sample/.htaccess - 777
/media/images/smiles/sample/all files - 777
/inc/prof.inc.php - 777