Currently, moneyGuru "over de-reconcile" when editing transactions. For example, when a reconciled transaction moves money from an asset to an expense account, changing the "To" column of that transaction will de-reconcile the asset entry, even though no actual change is made to that entry.
For people not using the "Reconciliation date" feature, it's not a big deal. Just press the spacebar, and the entry is reconciled again. However, for people having set a reconciliation date that is different from the entry date, important data is lost in this de-reconciliation and it's annoying to have to re-enter it.
Although the behavior of the transaction table w.r.t de-reconciliation is not a bug itself, the reason why there's this behavior is kind of buggish in nature (it's an unintended byproduct of currency setting in Transaction.change()), so I'm fixing this for 2.3.6
Or is it...? Bah, I'll get to the bottom of this.
(from [b81fda8fa527]) [#237 state:fixed] Fixed erronous de-reconciliation on ttable edits.