denisl - 8:08 am on Feb 3, 2011 (gmt 0)

Isn't it normall to see a drop off at the end of the month and pick up at the beginning?

Advertisers may work on a monthly budget that runs dry at the end of the month and visitors paid monthly are less in a frame of mind to buy (or consider buying) when the bank balance gets low towards the end of the month.