[Moin-user] Problem with plugins after upgrading to 1.6.0

[Jim Wight]

I've converted one wiki (from 1.3.5) to use 1.6.0. Pages are being
displayed OK apart from those accessing the plugin directory. Every
access of a page containing a 3rd-party macro results in an error of the
form:

   No module named plugin.macro.XYZ

I've copied a couple of the macros to a new wiki in the farm, where they
work fine. 

I can't spot any differences in the filesystem permissions leading to,
and within, the plugin directory. In fact, if I make the new wiki's
plugin directory be a symbolic link to the converted wiki's plugin
directory then the macros work fine in the new wiki.

What could be giving rise to the problem in the converted wiki? 

Jim