Sure... It repros for me every time in IE using the steps I outlined above. Do a query for "lang=en&q=http". Open the "next" link in a new tab of your browser and compare the ID's.
So I just did this from my home PC and here's the condensed output. Notice that on Page 2 not only do I get 3 dupes but I even get a result that should have been on Page 1... I hadn't seen that one before but I'll assume that maybe a different server serviced each request and they're not synced. ********* for: http://search.twitter.com/search.atom?lang=en&q=http <feed xmlns:google="http://base.google.com/ns/1.0"; xml:lang="en-US" xmlns:openSearch="http://a9.com/-/spec/opensearch/1.1/"; xmlns="http:// www.w3.org/2005/Atom" xmlns:twitter="http://api.twitter.com/";> <link type="application/atom+xml" rel="self" href="http:// search.twitter.com/search.atom?lang=en&q=http" /> <twitter:warning>adjusted since_id, it was older than allowed</ twitter:warning> <updated>2009-04-16T03:25:30Z</updated> <openSearch:itemsPerPage>15</openSearch:itemsPerPage> <openSearch:language>en</openSearch:language> <link type="application/atom+xml" rel="next" href="http:// search.twitter.com/search.atom?max_id=1530963910&page=2&q=http" /> ...removed... <entry> <id>tag:search.twitter.com,2005:1530963910</id> <published>2009-04-16T03:25:30Z</published> ...removed... </entry> <entry> <id>tag:search.twitter.com,2005:1530963896</id> </entry> <id>tag:search.twitter.com,2005:1530963895</id> <id>tag:search.twitter.com,2005:1530963894</id> <id>tag:search.twitter.com,2005:1530963881</id> <id>tag:search.twitter.com,2005:1530963865</id> <id>tag:search.twitter.com,2005:1530963860</id> <id>tag:search.twitter.com,2005:1530963834</id> <id>tag:search.twitter.com,2005:1530963833</id> <id>tag:search.twitter.com,2005:1530963829</id> <id>tag:search.twitter.com,2005:1530963827</id> <id>tag:search.twitter.com,2005:1530963812</id> <id>tag:search.twitter.com,2005:1530963811</id> <id>tag:search.twitter.com,2005:1530963796</id> <id>tag:search.twitter.com,2005:1530963786</id> </feed> ********* for: http://search.twitter.com/search.atom?max_id=1530963910&page=2&q=http <feed xmlns:google="http://base.google.com/ns/1.0"; xml:lang="en-US" xmlns:openSearch="http://a9.com/-/spec/opensearch/1.1/"; xmlns="http:// www.w3.org/2005/Atom" xmlns:twitter="http://api.twitter.com/";> <link type="application/atom+xml" rel="self" href="http:// search.twitter.com/search.atom?max_id=1530963910&page=2&q=http" /> <updated>2009-04-16T03:25:31Z</updated> <openSearch:itemsPerPage>15</openSearch:itemsPerPage> <openSearch:language>en</openSearch:language> <link type="application/atom+xml" rel="previous" href="http:// search.twitter.com/search.atom?max_id=1530963910&page=1&q=http" /> <link type="application/atom+xml" rel="next" href="http:// search.twitter.com/search.atom?max_id=1530963910&page=3&q=http" /> ...Removed... <entry> <id>tag:search.twitter.com,2005:1530963811</id> <published>2009-04-16T03:25:31Z</published> ...Duplicate 1... </entry> <entry> <id>tag:search.twitter.com,2005:1530963803</id> <published>2009-04-16T03:25:29Z</published> <twitter:lang>en</twitter:lang> ...Not Even In Previous Page... </entry> <entry> <id>tag:search.twitter.com,2005:1530963796</id> <published>2009-04-16T03:25:29Z</published> ...Duplicate 2... </entry> <entry> <id>tag:search.twitter.com,2005:1530963786</id> <published>2009-04-16T03:25:31Z</published> ...Duplicate 3... </entry> <entry> <id>tag:search.twitter.com,2005:1530963777</id> ...First New Result (save the one above)... </entry> <id>tag:search.twitter.com,2005:1530963755</id> <id>tag:search.twitter.com,2005:1530963732</id> <id>tag:search.twitter.com,2005:1530963725</id> <id>tag:search.twitter.com,2005:1530963718</id> <id>tag:search.twitter.com,2005:1530963710</id> <id>tag:search.twitter.com,2005:1530963709</id> <id>tag:search.twitter.com,2005:1530963706</id> <id>tag:search.twitter.com,2005:1530963699</id> <id>tag:search.twitter.com,2005:1530963698</id> <id>tag:search.twitter.com,2005:1530963690</id> </feed>
