I keep seeing these messages periodically in the CCM log

2013-06-08 14:51:49,277 [              WebContainer : 8] ERROR net.jazz.ajax.servlets.JavascriptServlet            - GET https://<server>:9443/ccm/web/_js/
?exclude=A~C~E~F~G~H~I~J~K~L~X~Y~Z~a~b~c~d~e~x&include=com.ibm.team.dashboard.web.ui.internal.DashboardPage.js&_proxyURL=%2Fccm&locale=en-usHEADER: Host = <server>:9443
HEADER: User-Agent = Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20100101 Firefox/17.0
HEADER: Accept = */*
HEADER: Accept-Language = en-US,en;q=0.5
HEADER: Accept-Encoding = gzip, deflate
HEADER: DNT = 1
HEADER: Connection = keep-alive
HEADER: Referer = https://<server>:9443/ccm/web/projects/ICM
HEADER: Cookie = JazzFormAuth=Form; net-jazz-ajax-cookie-rememberUserId=; JSESSIONID=000...:-1; LtpaToken2=Abv...Q==; JSESSIONID_LC_Cell02=0000DBmCjoEvw73aoaWmIOUmlJv:175s01coj:175rvedlt:175s0cugi; LtpaToken2=6vV...9C9; ibmSurvey=1370709675667; mmcore.tst=0.520; mmid=-1524635475%7CAgAAAAqPuiYOLgkAAA%3D%3D; mmcore.pd=931346810%7CAgAAAAoBQo+6Jg4uCd6kzBYBAGsDBiF+MtBIFnczLWNvbm5lY3Rpb25zLmlibS5jb20LAAAAdxiGH34y0EgAAAAA/////wAuCQEAAAAAAAIAAAAAAP///////////////wAAAAAAAUU%3D; mmcore.srv=cg3.use; UnicaNIODID=dgsy8T3u5mJ-YIL0HVD
Parameter: locale = [en-us]
Parameter: include = [com.ibm.team.dashboard.web.ui.internal.DashboardPage.js]
Parameter: _proxyURL = [/ccm]
Parameter: exclude = [A~C~E~F~G~H~I~J~K~L~X~Y~Z~a~b~c~d~e~x]

java.lang.IllegalArgumentException: Resource does not exist: x
    at net.jazz.ajax.model.Resource.resolve(Resource.java:193)

I see variations of the letter mentioned of which resource does not exist.  I saw a similar post about this kind of error, but that has a custom component name instead of a letter.  And I have confirmed that the solution mentioned was already turned on in the Advanced settings: https://jazz.net/forum/questions/71827/http-500-error-when-executing-custom-value-provider