Recursing sessions?

Here is a problem I am seeing, A browser hits a site the uses frames, for the sake of argument, lets call this site a squirrelmail web mail server. The browser seems to spawn a number of requests at the same time (I think one for each content frame), I get multiple PS_READ_FUNC calls, and then get multiple PS_WRITE_FUNC calls. Last PS_WRITE_FUNC call wins. Anyone else see this? Anyone have a good fix?