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I get a message "No segments found for this list." when I try to create a new segment...? Running Version 3.0.5.
I checked your PHP version and see that it's running on a very old version 5.2.6.
I suggest contacting your hosting support to upgrade your PHP to at least version 5.3+. Your current PHP version (5.2.6) is very old and outdated and may not support the SQL queries used to run segmentation.
Your PHP version also causes slashes to appear when apostrophes are used due to magic_quotes (see my other reply).