--- a/bwa.xml	Tue Dec 16 15:22:56 2014 -0500
+++ b/bwa.xml	Wed Jan 14 13:51:07 2015 -0500
@@ -363,14 +363,8 @@
       </param>
       <when value="set">
         <param name="ID" type="text" value="readgroup1" size="20" label="Specify readgroup ID" help="This value must be unique among multiple samples in your experiment">
-          <sanitizer invalid_char="">
-            <valid initial="string.printable"/>
-          </sanitizer>
         </param>
         <param name="SM" type="text" value="blood" size="20" label="Specify readgroup sample name (SM)" help="This value should be descriptive">
-          <sanitizer invalid_char="">
-            <valid initial="string.printable"/>
-          </sanitizer>
         </param>
       </when>
       <when value="do_not_set">