--- ./java/org/apache/catalina/connector/Request.java.orig	2011-02-02 15:50:25.623469439 -0700
+++ ./java/org/apache/catalina/connector/Request.java	2011-02-02 15:51:58.832219055 -0700
@@ -2717,8 +2717,14 @@
             int semi = entry.indexOf(";q=");
             if (semi >= 0) {
                 try {
-                    quality = Double.parseDouble(entry.substring(semi + 3));
+                    String strQuality = entry.substring(semi + 3);
+                    if (strQuality.length() <= 5) {
+                        quality = Double.parseDouble(strQuality);
+                    } else {
+                        quality = 0.0;
+                    }
                 } catch (NumberFormatException e) {
+
                     quality = 0.0;
                 }
                 entry = entry.substring(0, semi);