Updates currently included Smack (3.3.1) to 3.4.1 version, which includes 28 issues fixed. Among them memory leaks and NPEs fixes, support for Message Carbons (still needs a work on Spark GUI to hook in), Stanza Forwarding and other improvements.
Apparently Smack's internal version hasn't been changed for 3.4.1. I have compared sizes of what is now included in Spark latest build and in smack 3.4.1 zip and they are the same. So we will consider this an update to 3.4.1. Only it will show 3.4.0 in the About window.
Updated to Smack 4 instead.