The welder didn't actually reweld it. The bracket is a "C" shaped piece and the ears of the "C" broke off. Welding them back on without other reinforcement should be looked upon as a temporary fix, and you should have it checked as soon as possible. Or let me put it this way - I can (and do) weld, and I wouldn't trust it unless I added some reinforcements to the bracket.
BTW: Here is another thread on this same topic:
http://www.montanaowners.com/forums/...ad.php?t=35406