+
+>> Perfect, thanks!
+>>
+>> In the end I decided that I didn't need any special characters in filenames and replaced everything but alphanumeric characters with underscores. In addition to replacing bad characters I also collapse multiple underscores into a single one, and strip off trailing and leading underscores to make tidy filenames. If it's useful to anybody else here's a sed example:
+>>
+>> # echo "++ Bad: ~@#$%^&*()_=}{[];,? Iki: +_-:./ Num: 65.5 ++" | sed -e 's/[^A-Za-z0-9_]/_/g' -e 's/__*/_/g' -e 's/^_//g' -e 's/_$//g'
+>> Bad_Iki_Num_65_5
+>>
+>>--[[AdamShand]]