This may not be the right forum to ask this question, but I couldn't think of anyone more qualified, so here goes:
I used to be able to download class handouts (pdf) but recently it stopped working & I get a warning (please see attached). The only change I had was install Adobe Acrobat 9 Pro. My colleague has the same problem & had Adobe Acrobat 9 Standard installed. Has anyone had this problem & managed to solve it? Thanks.
PS My computer at home has Acrobat 7 installed and I have no trouble downloading.