Probably some underlaying graphics library used by dot changed.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@27145
a592a061-630c-0410-9148-
cb99ea01b6c8
# generated by dot. Possible values are gif, jpg, and png
# If left blank gif will be used.
-DOT_IMAGE_FORMAT = gif
+DOT_IMAGE_FORMAT = png
# The tag DOT_PATH can be used to specify the path where the dot tool can be
# found. If left blank, it is assumed the dot tool can be found on the path.