This is a temporary fix for Jamba 0.4d (the version name is still 0.4d, but it is a changed addon!):
http://www.wow-multiboxing.com/files/Jamba.zip

Changes:
- changed TOC version so it doesn't get marked as an out-of-date macro
- disabled hiding of party invite dialog

[edit] Check the official Jamba thread for unofficial updates until Jafula comes back. I won't post them here.