The message you get is due to a bug in a GT module.
However, the message should only be written to your error log file, not to the screen, maybe your webserver is not configured properly....
As a quick fix, open admin/GT/Plugins.pm, and replace
Code:
$self->debug ("Plugin pre $hook_name stopped further plugins.");
with
Code:
$self->debug ("Plugin pre $hook_name stopped further plugins.")
if ($self->{_debug});
Note that there are two points in the Plugins.pm file, where you have to do the replacement.
Ivan
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Iyengar Yoga Resources /
GT Plugins