These messages are littering JAC

2009-04-27 17:59:21,815 http-j2ee.jira.atlassian.com%2F127.0.0.101-8080-Processor10 ERROR [500ErrorPage.jsp] Exception caught in 500 page Invalid date format. Please enter the date in the format "d/MMM/yy".
com.atlassian.jira.issue.customfields.impl.FieldValidationException: Invalid date format. Please enter the date in the format "d/MMM/yy".
at com.atlassian.jira.issue.customfields.converters.DatePickerConverter.getTimestamp(DatePickerConverter.java:52)
at com.atlassian.jira.issue.search.searchers.impl.GenericDateSearcher.populateSearchRequest(GenericDateSearcher.java:180)
at com.atlassian.jira.issue.search.DefaultSearchRequestFactory.create(DefaultSearchRequestFactory.java:59)
at com.atlassian.jira.issue.search.DefaultSearchRequestFactory.getSearchRequestWithSearchSorts(DefaultSearchRequestFactory.java:90)
at com.atlassian.jira.plugin.searchrequestview.SearchRequestURLHandler.handleRequest(SearchRequestURLHandler.java:172)
at com.atlassian.jira.web.servlet.SearchRequestViewServlet.doGet(SearchRequestViewServlet.java:27)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.jira.web.filters.AccessLogFilter.doFilter(AccessLogFilter.java:73)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:204)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:120)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:138)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
at com.atlassian.jira.web.filters.JIRAProfilingFilter.doFilter(JIRAProfilingFilter.java:16)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)

I am not sure a data entry problem is worthy of a log message.

There are 135 of these messages in JAC after 12 hours of being restarted or round about 10 an hour!