Index: PerforceSCM.java
===================================================================
--- PerforceSCM.java	(revision 16374)
+++ PerforceSCM.java	(working copy)
@@ -483,19 +483,17 @@
 
         public SCM newInstance(StaplerRequest req, JSONObject formData) throws FormException {
         	String value = req.getParameter("p4.forceSync");
-        	boolean force = false;
-        	if(value != null && !value.equals(""))
-        		force = new Boolean(value);
+        	boolean force = Boolean.valueOf(value);
         	
         	value = req.getParameter("p4.updateView");
-        	boolean update = false;
-        	if(value != null && !value.equals(""))
-        		update = new Boolean(value);
+        	boolean update = Boolean.valueOf(value);
 
         	value = req.getParameter("p4.firstChange");
         	int firstChange = -1;
-        	if(value != null && !value.equals(""))
-        		firstChange = new Integer(value);
+            // trim extra whitespace to avoid NumberFormatExceptions
+        	if(value != null && value.trim().length()>0){
+        		firstChange = new Integer(value.trim());
+            }
 
             return new PerforceSCM(
                 req.getParameter("p4.user"),