hey...

how long have you been curing them for?
are they still very moist and does humidity collect inside the jar when it is closed?

If they are still pretty moist, I would definitely leave the jars open -- better yet i would take the buds out and hang dry them for a while longer (thats me being paranoid)

If they seem dry enough by the time you leave, you should be fine leaving them in the jars.. but it all depends how long you been curing them for already.

good luck