A few thoughts about possible causes, based on past bloopers of my own:
- A spot or spots that didn't get oiled or greased thoroughly
- A bit of residue from a previous bake that wasn't removed during washing
- A leaky rolled or filled loaf (like cinnamon-raisin bread)that allows a sugary filling to come in contact with the tin

There are also breads with lots of fruit, like Clayton's Pain Alsace (if I'm remembering the name correctly), that require extra grease and very thorough coverage of the tin to prevent sticking.

I don't know if any of these apply to your circumstance.

Even though it tastes the same, a mangled loaf just isn't as satisfying to the eye, is it?

If my pan is well greased and it still sticks, I give it 5 minutes longer in the oven. It might not be done. With very leaky rolls, I butter and dust the bottom and sides with bread crumbs or seeds or rolled oats. With new pans, I like to lightly grease them and bake them alone the first time and let them smoke a little. Over time when a patina has developed on the pans, they are practically "no stick" and require very little grease. You might find that certain lower temperature margarines. tend to burn also, adding to stick problem especially those with high milk content. Try switching to sunflower, olive, peanut or corn oil.
The last loaf that stuck on me, I turned the pan upside down on the rack and placed a cold wet dishtowel on the tin for 10 min. When that didn't work, I put the tin onto the gas burner and zapped it for 10 seconds at low flame. That did it. :) Mini Oven

Whenever I bake quick breads, which are usually sweet/fruity, I always use parchment
paper in the bottom of the tin. They never stick.
I have had no problems with yeast bread, but parchment paper would certainly work
very well there too.

please!!! u make pizza,? cinn rolls ? hard rolls soft rolls cinn buns bread sticky gooey bread buttery bred cinn bred pretzels U name it!!! even bagels . when u bake learn to use parchment, sticky buns great stuff 60 yrs ago ,I used that paper on every pan for rings sweet breads name it pans are easy to clean too Today we have recycled paper great! HOTBRED !!! pam spray is good for raising yeast dough,so it wont stick to the bowl while raising,, also layer cakes

Interesting ideas everyone, I will try some - am wondering if I actually over greased the tin ... will post any results

Thanx helend :)

I've been using my breadmaker for over a year now, gradually the sticking problem got worse.  I've read a few forums but haven't yet seen the answer.  So, I tried my own solution - and it works!!.  Load up the breadmaker as usual, then after it has finished its second knead - probably about one and half hours (depending on the cycle you're using), take the tin out of the breadmaker and let the contents drop into a mixing bowl, there shouldn't be any sticky dough in the tin at this stage, but if so, just remove it.  Then rub margarine or butter on the paddle and just underneath the paddle, let the dough "plop" back into the bread tin, continue the baking cycle - end result NO STICKING BREAD.  Obviously, you won't be able to use this method on an overnight batch, unless you set your alarm and are prepared to get up before dawn! Hope this works for everyone. Let me know.

Thanks for all the useful comments folks.  Unfortunately, nothing really worked.

final solution:  throw out tin, buy new non-stick tin.  Watch loaves fall out when baked :))

Good for you!! If you are like me, you've had your loaf pans forever..like 20 years! I recently bought 2 new 9x5"s, because all I had were 8x4"s..hmmmm. what a difference! The new "non-stick finishes" definitely make a difference! Way cool!

   when I was a kid,I worked in the bergenfield bake shop  cleanup & also preping diff things  the greasong of pans is 1  .  You take 2lbs shortning  2lbs flour beat it to death, till its fluffy,  thats aprox 50  50  put it in a #10 can get a round paint brush  any pan u want    NOW with the dough in the GREASED pan,will not stick even cheesecake wont stick. think about it   heat melts shortning  leaves flour resedew  that wont let the product stick   ok   hotbred