"L" style power adapter trouble with Black Macbook

Hey guys. So recently my cat chewed my old "T" shaped power adapter, so I was forced to buy a new one. I went and picked up the "L" style one. Thing is, it won't charge/be recognized unless I restart the computer. Even then, if I unplug it and then close the computer to put it to sleep and then try to plug in and charge again it won't work. I tried powering off, removing battery, holding the power button down for 5 seconds and the turning it back on and charging. It charges but then if I remove the charger and put it to sleep it won't work. Is there any way to fix this?
~LA

Like most above...recently had my "T" style magsafe cord fray so Apple replaced with newer "L" style magsafe. Figured -- Sweet! -- must be better. Boy was I WRONG! This newer style simply has issues with my Late-2009 MBP. Works for about a month, but then I get power connection issues. The green light keeps flickering off despite the magnet being fully seated in the slot. A jiggle gets the green light to go back on but then a puff of air makes it shut off. Sometimes I'll flip the orientation around to get the green light back but i'll go off eventually with the slightest jostle.
Have the Firmware Update. Did the SMC reset. Checked to see if any foreign object in the computer magsafe port. There was nothing. Cleaned male/female contacts. No kinks in cord. Basically I'm on my third warrantied 'brand new' magsafe that has connection issues.
Fortunately for me I had a brand new "T" style plug that originally shipped with my MBP. Weird thing is that it works just fine. No power disconnections. Ended up calling Apple, and went to Apple store as well as authorized service centre to see what's up but all claim there is no known issuses with "L" style Magsafes but rather my only options are to continue warrantying and swapping out the Magsafes or let them have my MBP for a few days to open up and see what's up. Ummm...uhhh...***?

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