structkeyexists finding keys that do not exists in CF 9

I found an odd issue with structkeyexists.

<cfset ticket = structnew()>
<cfset thiskey = "u|406468633|txslfault06">

<cfset structinsert(ticket, thiskey, "VOC000003770699|1349211974|tiegsda")>

<cfdump var="#ticket#">

<cfif structkeyexists(ticket, "u|398230449|njbdfault05")>
<cfset raw = structfind(ticket, "u|398230449|njbdfault05")>
    <cfdump var="#raw#">
</cfif>

somehow it thinks that u|398230449|njbdfault05 is the same as: u|406468633|txslfault06

any Ideas?