For the Liberation fonts, in characters with dot accents, the dots are not aligned with the dot on the letter i. For some faces, the misalignment is more pronounced, particularly in the Liberation Sans regular font. The problem is shown in the screenshots for dotted c (Unicode 10B), dotted e (117), dotted g (121), and dotted z (17c).
Created attachment 154979 [details] Liberation Sans dot accents not aligned with i dot
Created attachment 154980 [details] Liberation Serif dot accents not aligned with i dot
Created attachment 154981 [details] Liberation Mono dot accents not aligned with i dot
Currently, Liberation Fonts modification is not authorized except by their manufacturer. This bug is tracked by bug# 304441 for prompting to the attention of Ascender.
After source update via bug#428596, the bug still able to be reproduced:
Created attachment 292598 [details] proof 1/3
Created attachment 292599 [details] proof 2/3
Created attachment 292600 [details] proof 3/3
According to the testing, the issue had been fixed. You may feel the dots are still no aligned on the following attached pictures. However, they are 'illusions' of human eyes. This could be proved with dragging a horizontal lines to measure by photo editing softwares like Photoshop (r) or GIMP. The latest version of font will be updated on rawhide very soon.
Created attachment 298967 [details] Test result pictures - serif.
Created attachment 298968 [details] Test result pictures - sans.
Created attachment 298969 [details] Test result pictures - mono.
Created attachment 298970 [details] Revised fonts.
Bulit on rawhide.
Wow! This issue was considered worthy of attention and a fix in Liberation fonts. The dots are all other the place in DejaVu Serif and Sans. DajaVu maintainers are aware but are not making a "decision", aka procrastinating. See bug 439964