log file spam : [warn] router info incompatible with extra info (reason: Extrainfo published time did not match routerdesc)
not sure if this is 0.2.6.2_alpha related or due to this section :
# make stem happy: https://stem.torproject.org/tutorials/mirror_mirror_on_the_wall.html
#
FetchDirInfoEarly 1
FetchDirInfoExtraEarly 1
FetchUselessDescriptors 1
UseMicrodescriptors 0
DownloadExtraInfo 1
but now I get ~1000 lines of warnings in the log (w/o detail info about the affected relay ....) at every restart