Thank you, everyone, for taking the time to reply.

The liner in question is already ten years old, and has been lying outside, folded up for about three weeks now (not to mention the fact that we put a hole in it removing it, and it has already been patched a couple of times), so it definitely sounds like I will be getting another liner. This is an overlap liner, btw.

jenpen, thanks for the liner link. I am not sure what gauge those liners are, but at the same time, I'm not sure what I need or what all is available. I have seen sites with 20 and 25 gauge liners... are these the only options? I am assuming I would prefer to go with the 25 if so. I don't mind paying extra for peace-of-mind as far as quality goes. A plain blue one is OK, especially since it seems like patterned ones would detract from the ability to spot foreign material in the pool, dive for objects, etc.

I will do some forum scanning for suggestions on where and what to buy. Thanks to all of you again.