On Linux, using JDK 1.6.0_01

When using "security on," the following exception occurs when username and
password are submitted to login:

[Winstone 2007/05/15 09:25:47] - Untrapped Error in Servlet
java.lang.IndexOutOfBoundsException
at java.io.InputStream.read(InputStream.java:149)
at winstone.auth.RetryRequestParams.<init>(RetryRequestParams.java:78)
at
winstone.auth.FormAuthenticationHandler.requestAuthentication(FormAuthenticationHandler.java:115)
at
winstone.auth.BaseAuthenticationHandler.doRoleCheck(BaseAuthenticationHandler.java:121)
at
winstone.auth.FormAuthenticationHandler.validatePossibleAuthenticationResponse(FormAuthenticationHandler.java:182)
at
winstone.auth.BaseAuthenticationHandler.processAuthentication(BaseAuthenticationHandler.java:85)
at
winstone.auth.FormAuthenticationHandler.processAuthentication(FormAuthenticationHandler.java:99)
at
winstone.RequestDispatcher.continueAfterSecurityCheck(RequestDispatcher.java:349)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:323)
at
winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)
at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
at java.lang.Thread.run(Thread.java:619)