UltraISO 9.7.1.3519, text is shifted down slightly in one control, but its neighbor control is ok

0.4.11-RC-22-g2522ec1 gcc dbg linux.

UltraISO 9.7.1.3519 from rapps.

The text rendering and y centering looks quite good already.

But there is a trivial issue, I create the ticket only in the hope, it might help katayama_hirofumi_mz to investigate CORE-15478.

In the control beneath my mouse cursor ('Total size') the text looks shifted one Pixel downwards, but in the neighbor control it looks properly centered in y to my naive view.
0.4.11-RC-22-g2522ec1__UltraISO_sizeNotCentered.png
0.4.11-RC-22-g2522ec1.log

My naive view also thinks that the same font is used in both controls.
Does the "container" control play a role in the centering maybe?
I am thinking: Maybe one container is broken, while the other works?

Expected result
2K3_SP2_yOffset_ok.png