FAQ.How to avoid __NSAutoreleaseNoPool console messages in threads?

Answer: You need to use your own NSAutoreleasePool on a thread like this:

Example

sub MyThread.run
  dim pool as new NSAutoreleasePoolMBS
  // do work here
  
  pool=nil
end sub

For more details read here:
http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSAutoreleasePool_Class/Reference/Reference.html