Version: 1.10.3 (using 4.1.3 (KDE 4.1.3), Kubuntu packages) Compiler: cc OS: Linux (i686) release 2.6.27-9-generic In KMail prior to 1.10, if you had multiple identities each with a different signature, and you switched identities while composing a message, it would also switch to the corresponding signature. That has since broken in 1.10, where changing identities has no effect on the signature.
Fixed in current trunk.