Hello,
A particular font size issue can be observed in vanilla Pd and package puredata on Raspbian Wheezy and Jessie: font size 10 is larger for object boxes, message boxes and comments than for IEM guis (bang, toggle, slider, radio button, canvas). Object/message/comment characters are too large in number of pixels. When Edit > Font > Font Size is set to 8, their size is identical to IEM gui font size 10. This inconsistency does not happen for me on Xubuntu. A test patch and two screenshots are attached for illustration.
For IEM guis, font size 10 translates to 6 pixels per character on both systems, given the default font type DejaVu Sans Mono. For object boxes, message boxes and comments, font size 10 is 6 pixels on Xubuntu and almost 7 pixels on Raspbian.
I don't know if this issue is related to font size effects on Windows as described by Roman in another thread. In any case, consequences are similar: patches created on Xubuntu tend to look messy on Raspbian, sometimes with overlapping texts. With XFCE (Xubuntu's default desktop environment) installed on Raspbian the issue still persists. Custom dpi setting has no effect on Pd. What else might cause the difference in behavior on those systems?
Katja