i was ready to jb my ipad running on 3.2 but after reading several threads here and other sites, it seems that it doesn't matter if u have 3.2 or 3.2.1, tiny umbrella will save it as 3.2.2 as was in my case when i ran t.u.
would it be the same issue if u used autoshsh?
my concern is to restore it back to 3.2 should something go wrong after jb.
Sadly that is the thing, the only way that cydia and TU (which uses saurik's servers) can backup your shsh is if you do it during the time they are signing that version.
Its the man in the middle approach, they ask apple for the shsh signing info based off of your phones id and store it for you to use later.