Mapserver bug?

[Jeff Portwine]

I'm pretty sure that this issue i'm having was posted about once before a week or two ago by somebody else, but there wasn't much response to it and I'm not sure if it is a mapserver bug, or something I'm doing wrong, or if there is a workaround for it.    

When my map form submits and is redrawn according to whatever buttons the user has clicked (panning buttons, zoom, etc) it will sometimes jump back to an old image instead of displaying the image it is supposed to be showing.    If you then just click refresh in the browser, it displays the proper image.    At first I thought it was some kind of browser caching issue, so I tried all the meta tags and http headers I could find to disable the caching of images in my application... but that didn't fix the problem.    The problem also seems to be browser independant as I see the same behavior in internet explorer and Mozilla firefox.      It also seems to get worse over time... when I first load up the browser and go to the web page it will work perfectly for a little bit, but after a short time it will start showing old images and eventually it will start doing it almost every refresh.  

Have any others had this kind of problem, and has anybody found a way to fix it or avoid it?

Thanks for any advice,
Jeff
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