I was shocked/pissed off to hear that Mumbai team are allowed to play five foreign players instead of four foreign players like other team. They were allowed this because of the injury to eight Indian players including Sachin Tendulkar.
Whatever the reason it might have been, I am sure this is a very poor choice by the administrators. Especially considering that there are other options like the the team being allowed to get a new, unsigned Indian player. If Mumbai Indians have been allowed to play 5 players, then even the other IPL teams should have been allowed to do so.
This is just a bad precedent and would be surely exploited by the future IPL Teams.
P.S: Considering that the team is being captained by Harbhajan Singh, even this rule might not make a huge difference to the team's fortunes. :)