For some reason for a long time it has not been possible (using Firefox, not tested IE) to copy a topic name listed on the WebChanges
page. It simply does not highlight.
It goes red when you point to it but its not possible to drag over it to copy the text name of the page onto the clipboard.
I think this is not specific for TWiki, nor for the PatternSkin. To drag the text of a link to the clipboard it is usually necessary to click just "one pixel outside" the active area of the link, in either Firefox or IE, and then drag across the text you want to copy. Do you have an example of a link where Firefox has different behaviour?
Agreed. You can click outside the link and drag over it - I just tried.
On Sandbox.Sven.WebChanges - drag over a topic name from left to right, a single pixel beyond and the text gets unselected. Quite unintuitive.