The tsa package installs a detrend.m file in the path that shadows the core detrend function of Octave. I think that this is wrong and should be fixed upstream. Do you think we should do anything for the Debian package, like patching the sources and renaming the offending file? The problem with this is that detrend is one of the public functions of the external "API" of the tsa package. Suggestions are welcome. Rafael