If you tally the transactions visible in the ledger, what total amount do you end up with? If you double click on the wallet, is the balance off as well?
If I double click on the wallet the balance is OK.
I just discovered this: if I click on "Date", "Wallet", "Comments", or "Amount" on the transactions view the sorting of the transactions doesn't change but the balance updates to the correct amount. So I guess this bug is related to the wallet filter and the transactions view.