For last few days Google Chrome has stop auto downloading files from sites like Fileserve and Megaupload it works well with Internet Explorer not sure whether it happend with Chrome 9 update or not ?
I am facing same issue so I download through IE(as I don't have premium membership of filehosting sites).
Other method (sometimes works & sometimes not) is press Alt button then click on download link(keep holding alt) now it will download manually.
For file hosting i switch to firefox. Somehow all integration works fine for idm on firefox.
Regarding the earlier thing i mentioned it was there in older version of idm but absent in newer version.