Here I am going to describe a bug that I found recently with InfoPath 2003 and Internet Explorer 7 (IE7).

Here is my scenario: an InfoPath form library exists in a SharePoint site created by SharePoint Portal Server 2003 and the form library has an InfoPath form template. If anyone with Internet Explorer 6 (IE6) opens an InfoPath document in the library and print to a printer that is not the default printer, there is no problem. HOWEVER, if you have Internet Explorer 7 (IE7) installed on your machine and try to print to any non-default printer in InfoPath 2003, the document will automatically be printed to your default printer.

This bug has been around for a long time but no update or fix has been created by Microsoft. Maybe it will be a different story if you have IE7 and InfoPath 2007. I have not yet tested this with IE7 and InfoPath 2007 but I do not think IE7 and InfoPath 2007 will have any problem. They must be fully compatible since they are tightly connected according to Microsoft.

There is also a compatibility issue between Microsoft Office Outlook and InfoPath. Outlook 2007 does not like InfoPath 2003 form submission and Outlook 2003 does not like InfoPath 2007 form submission to SharePoint 2003 form libraries. If you are planning to upgrade to Internet Explorer 7 or Windows Vista, you might want to consider purchasing Microsoft Office 2007. Or, if you are going to stick to Microsoft Office 2003, you just have to keep using Internet Explorer 6 and Windows XP :)