Originally Posted by Lenard
Perhaps your downloading meathod is adding unwanted/needed extra information to the ISO files. Since you do not specify which ISO's your downloading I will suggest using wget to download them from the same mirrors you already tried and in case you need wget;
An example of using wget to download an ISO;
I'm trying to donwload ISO's like this one
FC4-x86_64-disc1.iso from frp turgaz(dot)at (I'm not allowed to post a link u know)
In fact I tried the above link with wget but the same.
Checksum is totally different.
I'll try now ur link although it's a kind slow one (<100KB/s)