When the default text size is increased above 100% the search field does not increase as well and the text is cut off. I have my text size set to 200% and the field cuts off the bottom third of the letters.
You might have to change program scaling in Tools | Program Settings AND reduce default font size.
I am able to reproduce this on Windows, and will pass this report on to Development.
This will be fixed in 5.2a Beta 2.
