Probably that the timer type should be exported as well in pkgdcl.lisp considering that to use exported remove-timer objects of type timer have to be provided... Thus, it's useful to define a struct or class holding an object of type (or timer null) to remove-timer if t later on (if set to a timer returned by add-timer)?

Also, is there, or was there recently a known bug that prevents remove-timer from actually disabling a timer? I have a timer in repeat mode which appears to be triggered even after it was removed...

Thanks,