I saw the same when I tried download with my WIN PC (some minutes ago, Seamonkey Browser) and also with an Android 2.1 Tablet in the afternoon (14:30 UTC)
Problem has been confirmed on <email@example.com> "[Webseite] ImpressRemote laesst sich nicht runterladen?"
New due to confirmation on mailing list
Now WFM with PC and Tablet.
file modes are verifiably correct now.