This question must have been asked and answered 100 times here but none of the answers work for me!

I have two phpbb forums - on one I can change the page title for the index page, on the other I can't. The only difference is that the problem one (designforumpolska.pl) is located in the root and is phpbb3 SEO premodded while the one that works (thealoeverasite.com/forum/) is in a subdirectory and is phpbb3 with SEO mod added...

So for designforumpolska.pl I have updated common.php in both the en and the pl folder of languages. I know phpbb is picking up changes from these because if I change the 'FORUM_INDEX' and clear the cache it picks up the change. But when I change 'INDEX' it does nothing... and yes I'm clearing the cache each time;-)

Is there some setting in the SEO area I'm missing that is overwriting the common.php settings in the language files?

Any ideas?

You have to apply the Prosilver / subsilver2 code changes or use the premodded prosilver template files.