Struts 2.2.1 Problem

[Michelle Weeks]

I have just started using Struts 2.2.1, and I have found a bug ... I
have several Hash Maps with a String for the key value.  These key
values sometimes contain special characters, including '-, /, \, _' any
Map with a key value containing one of these characters seems to
silently fail to call the set method.  Any ideas on a fix??