Issue: Suppose you have an Excel XML file and you try to open it in inside an Internet Explorer 32 bit version(by drag drop), it opens just fine in Excel on a Microsoft Office 2010 machine. But if you try to open the same XML file inside a 64 bit version...

Few days back i worked on a problem where a VSTO addin was failing to load after VSTO 4.0 SP1 was installed on the machine. This addin was reading some data from its application configuration file. There was some error during the load of the addin and...