When they are driving the Porsche at speed there are a couple of shots which show the famous Irish Pub, Molly Malone's. The scene was set in 1994, and whilst Molly Malone's is the oldest Irish Pub in Singapore it was only established in 1995.
When Nick faxes the forged documents to the auditor, the header on the fax is dated February 5, 1995. A few days later, a devastating earthquake rocks Kobe, Japan. The Kobe earthquake actually happened a few weeks earlier, on 17 January 1995.
Towards the end of the movie, in a scene where various newspapers were shown documenting the search for Leeson, a Chinese newspaper's caption for Leeson's picture actually reads "(Chinese Premier) Zhu Rongji Happily Meets (UK Prime Minister) Tony Blair".