My sister-in-law called with problem opening attachments from hotmail. She recently had her computer updated and is now running IE9.
She says that previously she could right-click on the arrow to the left of the download button on the attachment and open it, but that isn't working now. She can download the file and then open it, but this is rather inconvenient.
She demonstrated this with various attachment types, pdf, jpg and word. The solution to this is probably simple, but is eluding me.