--- Mailman/Cgi/admin.py	2014-02-04 02:09:14.000000000 +0900
+++ Mailman/Cgi/admin.py	2015-04-10 01:57:54.383610004 +0900
@@ -903,6 +903,10 @@
     all.sort(lambda x, y: cmp(x.lower(), y.lower()))
     # See if the query has a regular expression
     regexp = cgidata.getvalue('findmember', '').strip()
+    try:
+        regexp = regexp.decode()
+    except:
+        pass
     if regexp:
         try:
             cre = re.compile(regexp, re.IGNORECASE)