Hi,
In the latest versions (stable and beta), there is a bug with the arrow pointing on stop-note :

@startuml
start
if (test) then (yes)
stop
note:foo
else (no)
endif
stop
@enduml
Even with a "note right", the length of the arrow is badly evaluated :
@startuml
start
if (test) then (yes)
stop
note right:foobar foobar foobar
else (no)
endif
stop
@enduml
Thanks for your help.