Bothersome BeanUtils.populate exception

[Mark Lowe]

beanUtils keeps getting its knickers in a twist when i submit a form  
with 2 select menus with multiple values. I've had this working before  
with the same version of struts and commons. Its not the action as the  
exception is thrown before i get that far, when i remove the menus the  
form submits fine.

I have form properties of type arrayList. I;d expect this exception if  
i were to be using unsupported types but I've been setting the values  
with  String and the form properties are also of type string.

I have trouble believing that bean utils has an issue with converting  
Object to String when the values are copied.

The exception is a typical beanutils chocolate fire guard exception. If  
i weren't using strings i'd understand but i am.

Any insights welcomed.

java.lang.IllegalArgumentException: argument type mismatch
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at  
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav 
a:39)
        at  
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor 
Impl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at  
org.apache.commons.beanutils.PropertyUtils.setSimpleProperty(PropertyUti 
ls.java:1789)
        at  
org.apache.commons.beanutils.PropertyUtils.setNestedProperty(PropertyUti 
ls.java:1684)
        at  
org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.jav 
a:1713)
        at  
org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:1019)
        at  
org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)

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