Thank you Linly for spotting this. The problem is in conditions.php,
around line 74. It should read as follows:
if ($dir == 'plugins/') return file_exists("$pluginPath/$page");
Notice the / near the end. Needs to be added back in. In repairing the
dir=files option I assumed this needed fixing too, but in fact broke
it.
Will be fixed for the next release.
Cheers,
Dan