The following simple script will produce an error with 3.1.2, but not with 3.1.1
/ test_start2.rex /
'start "" "http://www.rexxla.org"'
Error is as follows:
The system cannot find the file http://www.rexxla.org.
HOWEVER, the script will continue to run AND open the web page. This does NOT appear to happen if your browser is already open.