It looks ugly but translate should work. Try (untested): 
//userprop[nameprop="Version" and contains(translate(valueprop,
                                   "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
                                   "abcdefghijklmnopqrstuvwxyz"),"v1.1
+")]

[download]
I'm not sure why you would want to lc the static string.
-derby

In reply to Re: Case insensitivity using Xpath and libXML by derby
in thread Case insensitivity using Xpath and libXML by Justudo

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