Using other community strings works, I would want to take a long hard look at your exact results and see if something may not have been obfuscating your cause and effect relationship here.
P.S. This is a 2 year old thread, and it doesn't directly relate to your issue pkokkinis, I don't know why he didn't get the response he got from me today 2 years ago.
***Modified by Fatman because he wanted to at least get most the egg off his face.