flotsam

I have a program at [a href=\"http://testbs.com/firecalc.php\" target=\"_blank\"]http://testbs.com/firecalc.php[/a] that works for almost everyone, however for Mac users with IE 5.2 only, the output includes pages of php div by zero errors. There are about 50 variables passed from the input form using a POST. Every variable in the form has a suitable default. Not using cookies and not using sessions. The Mac error happens regardless of user input. I modified the program so that the page doing the processing will display the input variables, and there is no difference between what is passed with MacIE5.2 and other browsers, so the problem is not the sending of data in the POST. Here is the sequence of events... Depending on a user selection, one or another bunch of numbers are loaded into an array (using ordinary php assignments, not database calls). The user selection determines which include file is selected. The next step is a division by one of the elements in the array -- this is where the div by zero error appears. In debugging, I added code to set that user selection in case it wasn't set -- no change. It appears that that file is not included, when the user is on a Mac with IE5.2. But I don't have a Mac to test with. This makes no sense to me, as everything happens at the server, and everything works find on other browsers. I even loaded the program on a different server -- same results. Anyone have any ideas? (If not, how do I trap for Mac IE5.2?) Thanks -- Bill