> you might download some vendor libraries like 10 times That reminds me that I once found 3 versions of jquery (or perhaps jquery-ui, my memory fades) linked

> you might download some vendor libraries like 10 times That reminds me that I once found 3 versions of jquery (or perhaps jquery-ui, my memory fades) linked from the same page. One was linked in the master (yes, this was webforms), one was being injected through a user control and the last was written into the page. All three were all different versions so were all being downloaded. This came to light when a controls stopped working when one version was 'updated'.