Please read the release notes at https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/release-notes/release-notes-0.6.1.md for details on what this release includes.
Please verify the PGP signatures of the releases before using. They are signed with AdamISZ's pubkey (fingerprint: 2B6F C204 D9BF 332D 062B 461A 1410 01A1 AF77 F20B.
Although the bug mentioned above creates inconvenience, not a risk of losing money, it's still recommended to upgrade immediately - in particular if you make lots (6 or more) of deposits to the wallet, as without this fix, deposits may not be recognized in the Joinmarket wallet without first requiring an additional rescan. See the release notes for details on the issue and how to fix it, if it affected you while running v0.6.0.