com.google.gwt.user.client.rpc.StatusCodeException: 12002 exception in IE8 (not Chrome or FF)

We have a GWT 2.4 app that makes regular (every 5 seconds) async rpc calls to request data from an httpd/tomcat web server.  In Firefox and Chrome everything works as expected but in IE8 after a seemingly random amount of time the calls start to fail with one of two errors:

com.google.gwt.user.client.rpc.StatusCodeException: 12002

com.google.gwt.user.client.rpc.StatusCodeException: 12031

12002 is apparently an ERROR_INTERNET_TIMEOUT and 12031 is ERROR_INTERNET_CONNECTION_RESET

The app will work fine for only a few minutes, and sometimes it will work for up to a whole day..

When the calls start to fail, I see nothing on the web server side (in the httpd logs or using tcpdump I see nothing happening).

Has anyone run into anything like this before?  Any thoughts?

Thanks,

Ryan

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