diff --git a/piwigo_thumbgen.sh b/piwigo_thumbgen.sh
index 06166ad..0e70d2b 100755
--- a/piwigo_thumbgen.sh
+++ b/piwigo_thumbgen.sh
@@ -20,7 +20,7 @@ fnPath=""
 STARTTIME=$(date +%s)
 
 # drop CIFS cache in case target files existed before 
-sync; echo 3 > /proc/sys/vm/drop_caches;
+#sync; echo 3 > /proc/sys/vm/drop_caches;
 
 for file in "$sourceDir"/**/*.{jpg,JPG,jpeg,JPEG}
 do
@@ -29,14 +29,15 @@ do
                 continue
         fi
 
-	case $file in
-		*[[:space:]]*)
-			# replace all blanks
-			mv "${file}" "${file// /_}"
-			file=${file// /_}
-			echo "Space replaced: ${file}"
-			;;
-	esac
+	# replace all blanks and brakets
+	exp='[() ]'
+	if [[ "$file" =~ $exp ]]
+	then
+		fileNew=${file//$exp/_}
+	        mv "${file}" "$fileNew"
+	        file="$fileNew"
+	        echo "Space replaced: ${file}"
+	fi
 
         fnNoExt="${file%.*}"
         fnExt="${file##*.}"
@@ -58,11 +59,17 @@ do
                 	echo $result
 	        fi
 
-		# Auto rotate source image according to exif orientation information
+		#auto rotate source image according to exif orientation information
 		orient=$(exiftool -Orientation "${file}")
-		if [ ! -z "${$orient##*"normal"*}" ]; then
-			mogrify -auto-rotate -quality 94 "${file}" #> /dev/null 2>&1 
+		if [[ $orient != *"normal"* ]]; then
+			quali=$(identify -format '%Q' "${file}")
+			if [ "$quali" -le "0" ]; then
+				quali=94
+			fi
+			echo "rotate with quality $quali : $file"
+			mogrify -auto-orient -quality ${quali} "${file}" #> /dev/null 2>&1 
 		fi
+
                 #echo "MISSING! ${destDir}${fnNoExt}-me.${fnExt}"
                 #Store correctly oriented base image (medium) in memory. All other thumbnails are created from this
                 convert "${file}" -auto-orient -thumbnail 1008x756^ -write mpr:baseline +delete \
@@ -71,7 +78,6 @@ do
 			mpr:baseline -thumbnail 150x9999 -write "${destDir}${fnNoExt}-cu_s150x9999.${fnExt}" +delete \
 			mpr:baseline -thumbnail 144x144 -write "${destDir}${fnNoExt}-th.${fnExt}" +delete \
 			mpr:baseline -define jpeg:size=144x144 -thumbnail 120x120^ -gravity center -extent 120x120 "${destDir}${fnNoExt}-sq.${fnExt}"
-			#mpr:baseline -resize 240x240 -write "${destDir}${fnNoExt}-2s.${fnExt}" +delete \
 	fi
         counter=$[$counter +1]
         if [ $(($counter%100)) -eq 0 ]; then
@@ -80,7 +86,7 @@ do
         fi
 done
 
-chown -R www-data: ${destDir}
+chown -R www-data:pi ${destDir}../
 
 ENDTIME=$(date +%s)
 echo "It took $((($ENDTIME - $STARTTIME)/60)) minutes to complete this task..."