https://bugzilla.redhat.com/show_bug.cgi?id=856239
--- Comment #63 from Ilya neptunia@mail.ru --- This picture shows the Liberation-1 (left) and so-called Liberation-2 (right)
http://storage1.static.itmages.ru/i/12/1109/h_1352416963_1081608_4a4c6af4c4....
As you can see, in the right picture some single vertical lines take several pixels while similar lines in other letters (or other parts of the same letter like in Russian ш in the word шрифтов) occupy 1 pixel. This unevenness creates an effect of blots spread through the text. Due to subpixel smoothing this also creates an "rainbow" effect while the text in the text in the left window looks evenly gray.
Some thick letters in the right window fuse such as letters "ым" in the word "лицензированными".
The broken hinting also makes the lower part of the в letter to appear smaller than the upper part (look at the word "шрифтов").