diff -up cups-filters-1.0.53/filter/pstopdf.execmem cups-filters-1.0.53/filter/pstopdf

--- cups-filters-1.0.53/filter/pstopdf.execmem	2014-06-06 13:48:30.005230247 +0100

+++ cups-filters-1.0.53/filter/pstopdf	2014-06-06 13:49:05.762403657 +0100

@@ -105,7 +105,7 @@ eval "$(printf "%s" "$5" | sed -nre 's/.

 eval "$(printf "%s" "$5" | sed -nre 's/.*(^|\s)orientation-requested=4.*/orientation="${orientation:-90}"/p')"

 eval "$(printf "%s" "$5" | sed -nre 's/.*(^|\s)orientation-requested=5.*/orientation="${orientation:-270}"/p')"

 eval "$(printf "%s" "$5" | sed -nre 's/.*(^|\s)orientation-requested=6.*/orientation="${orientation:-180}"/p')"

-if printf "%s" "$5" | grep -iPq '(\s|^)landscape(=(1|on|yes|true))?(\s|$)'; then

+if printf "%s" "$5" | grep -qiE '(\s|^)landscape(=(1|on|yes|true))?(\s|$)'; then

     if test -e "$PPD"; then

 	eval "$(sed -nre 's/^\*LandscapeOrientation:\s*Plus90.*/orientation="${orientation:-90}"/p' "$PPD")"

 	eval "$(sed -nre 's/^\*LandscapeOrientation:\s*Minus90.*/orientation="${orientation:-270}"/p' "$PPD")"