java.lang.ArrayIndexOutOfBoundsException in ChangelogServlet-doImageMap

When browsing a repository, Fisheye fails loading the line history graph and reports a server error below the graph.

The error reported in the log is:
2008-06-15 21:47:45,373 WARN [btpool0-3] fisheye.app ChangelogServlet-doImageMap - could not create image map for http://fisheye.coalevo.net/changelog/shell-access/
java.lang.ArrayIndexOutOfBoundsException: 26
at com.cenqua.fisheye.bucket.CalculatedBucketGraphXY.constructXYSeries(CalculatedBucketGraphXY.java:227)
at com.cenqua.fisheye.bucket.CalculatedBucketGraphXY.<init>(CalculatedBucketGraphXY.java:67)
at com.cenqua.fisheye.bucket.BucketGraph.getXYSeries(BucketGraph.java:175)
at com.cenqua.fisheye.bucket.BucketGraph.getXYSeries(BucketGraph.java:146)
at com.cenqua.fisheye.web.ChangelogServlet.doLineHistory(ChangelogServlet.java:296)
at com.cenqua.fisheye.web.ChangelogServlet.doImageMap(ChangelogServlet.java:94)
at com.cenqua.fisheye.web.ChangelogServlet.handleRequest(ChangelogServlet.java:78)
at com.cenqua.fisheye.web.BaseAction.processRequest(BaseAction.java:158)
at com.cenqua.fisheye.web.ActionDispatcherServlet.doIt(ActionDispatcherServlet.java:214)
at com.cenqua.fisheye.web.ActionDispatcherServlet.doGet(ActionDispatcherServlet.java:67)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1144)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:63)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1136)
at com.cenqua.fisheye.web.filters.TotalityFilter.doFilter(TotalityFilter.java:167)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1136)
at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:119)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:183)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:138)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1136)
at org.mortbay.servlet.UserAgentFilter.doFilter(UserAgentFilter.java:81)
at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter.java:129)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1136)
at com.cenqua.fisheye.web.filters.UpfrontFilter.doFilter(UpfrontFilter.java:39)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1136)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:722)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:404)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:828)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)

I have fully re-indexed the repository, but it did not resolve the problem, but logs don't report any problem while indexing.

I have attached a screenshot of the problem, but you may as well visit our public repository:
http://fisheye.coalevo.net/browse/shell-access