Some disruption to fixtures occurred as a result of the 2007 Rugby World Cup, which took place during September and October 2007.

The losing bonus point system is intended to ensure that both teams compete fully in all matches.

[citation needed] The ten teams competing were the four Irish provinces: Munster, Leinster, Connacht and Ulster; two Scottish regions: Edinburgh Rugby and Glasgow Warriors; and four Welsh regions: Llanelli Scarlets, Cardiff Blues, Ospreys and Newport Gwent Dragons.

As a result of increased revenue from governing bodies and TV rights, most clubs were able to expand their squads with the signing of several new players.

Television rights for the league were split between three broadcasters: BBC Wales, S4C and Setanta Sports.