I never like too much the concept of "helper classes",  

First of all I tried to found some written reference to "Helpers"  http://patternshare.org/default.aspx/Home.AllPatterns with no luck... But it seems to be any a class with static methods.

I also found http://patternshare.org/default.aspx/Home.PP.UtilityComponent wich I think should be deleted.

Both are examples of CodeSmells, more info on this here:

http://blogs.msdn.com/nickmalik/archive/2005/09/06/461404.aspx

http://blogs.msdn.com/nickmalik/archive/2005/09/07/462054.aspx