I've done some further searching, and noticed that tomcat was also dumping information into stdout. There is another log trace that might be helpful if anyone else recognizes the problem. I'm of the belief that this is a bug of some sort, but I don't know who to pass the information along to.
Also, I tried adding information into the context docbase, and it had no effect on the problem. I also removed all log4j files that I had added to the configuration. Again, this wasn't happening with tomcat 5.5.12, but started after I began to use 5.5.15. Thanks. log4j:ERROR Error occured while converting date. java.lang.NullPointerException at java.lang.System.arraycopy(Native Method) at java.lang.AbstractStringBuilder.getChars(AbstractStringBuilder.java:331) at java.lang.StringBuffer.getChars(StringBuffer.java:202) at org.apache.log4j.helpers.AbsoluteTimeDateFormat.format(AbsoluteTimeDateForma t.java:117) at java.text.DateFormat.format(DateFormat.java:314) at org.apache.log4j.helpers.PatternParser$DatePatternConverter.convert(PatternP arser.java:444) at org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:64) at org.apache.log4j.PatternLayout.format(PatternLayout.java:503) at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:301) at org.apache.log4j.WriterAppender.append(WriterAppender.java:159) at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:230) at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(Append erAttachableImpl.java:65) at org.apache.log4j.Category.callAppenders(Category.java:203) at org.apache.log4j.Category.forcedLog(Category.java:388) at org.apache.log4j.Category.log(Category.java:853) at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:133) at org.apache.catalina.core.ApplicationContext.log(ApplicationContext.java:638) at org.apache.catalina.core.ApplicationContextFacade.log(ApplicationContextFaca de.java:249) at org.springframework.web.context.ContextLoader.initWebApplicationContext(Cont extLoader.java:176) at org.springframework.web.context.ContextLoaderServlet.init(ContextLoaderServl et.java:83) at javax.servlet.GenericServlet.init(GenericServlet.java:211) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:11 05) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java: 3915) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4176) at org.apache.catalina.core.StandardContext.reload(StandardContext.java:2988) at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java: 403) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java: 1276) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC hildren(ContainerBase.java:1568) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC hildren(ContainerBase.java:1577) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processC hildren(ContainerBase.java:1577) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(Cont ainerBase.java:1557) at java.lang.Thread.run(Thread.java:595)