It wouldn't be Roundcube if there wasn't a minor glitch in our stable
releases every now and then :-) It so happened again in the recent
0.9.3 release where the new include_path check triggered some regex
warnings on Windows systems. We apologize for this inconvenience! But
we're trying hard to keep up and here's a new release which fixes that
nasty bug together with some other reported issues that we considered
worth being ported to the 0.9 release series.