I'm using vanilla
(require 'powerline) (powerline-center-theme) (load-theme 'solarized-light t)
And I get these artefacts (the malformed and sticking-slightly-above-modeline arrows), both when loading a theme after:
... or before
It happens in other themes as well, so
solarized likely isn't at fault. Have you encountered this issue or would guesstimate what might cause it (e.g.
Emacs 24.4, OS X 10.10.3