Has anyone else noticed this?

Exchanges

Market   Last   Volume (24h)   Bid   Ask   High   Low
mtgoxUSD   2.3400   101,696.62   2.34   2.34   2.54   2.04

After a few minutes:

       High   Low       Volume      Buy     Sell   Last
2.53600   2.04010   101560   2.34150   2.34200   2.34200

I've noticed this in the past, but always thought I may be tired or something......tonight I know it's accurate.............