In some web pages, pdf files are downloaded in very small kb and not opening despite I have Adobe reader, Pro and plug in
I have Firefox 3.6.6, downgraded from higher versions since I have this problem below. At some web pages (mostly professional academic sites like Oxford Journals), when I am clicking to get pdf of an article, Firefox start downloading ridiculously small size and cannot open it as it gives the message "Acrobat could not open 'filename.pdf' because it is either not a supported file type or because the file has been damaged ..."
I know the file is not damaged, because I can open them in explorer. And some websites are also working properly in Firefox. I do not care if it opens in firefox or pops up separately.
I have reloaded Acrobat and Firefox but problem continues.