Last modified: 2010-05-15 15:38:13 UTC
The history list includes two columns of diff links next to each revision: a 'cur' diffing against the then-latest revision, and a 'last' link diffing against the revision immediately previous to the one on that row. The URLs for the 'cur' links use 'diff=0', which does the diff against whatever the latest revision is _at the time you visit_ the URL. So if you copy and paste the URL meaning to show a particular edit, your link will in the future show different things. Now that current revisions have ID numbers in 1.5, these links should use the actual revision number.
:-P