I have just compiled in a new zaptel module (1.4.4), everything fine and asterisk working again as normal.
One puzzling thing is that ztcfg when run shows that
Zaptel Version: SVN-branch-1.4-r2406
which is possibly from an earlier install through subversion.
My process was to remove the old module .ko, then depmod, modprobe etc to reinstall.
Is there another way to ensure that I have the zaptel 1.4.4 active on the system?