I am also still having this problem. My machine is a MacBookPro1,1 with the most current firmware, 1.2f10 (as listed on this page:
http://support.apple.com/kb/ht1237). I cannot run the SMC 1.4 updater, as it is not supported for my machine.
I had to purchase a new L-type adapter after my T-style adapter frayed and came apart while traveling abroad. I am still traveling right now, and though I had brought two batteries with me I cannot charge either of them. I can only run the computer with no battery inserted–an incredible pain. If I have the machine running and insert a battery, the charge immediately ceases to work.
It is also impossible for me to find a T-style adapter to purchase in this country (Vietnam). So I'm in a bind.
I am a lifelong Apple customer (since 1990, first machine was an LCI) and this is the most disappointed I have ever been with the company. This problem should be fixed immediately–it is gross oversight to obsolesce a product (T-style adapter) that works perfectly, and then release a new product (L-style adapter) that doesn't work. I'm starting to feel like a PC user here.
Apple, I'm begging you, fix this IMMEDIATELY! It seems that you have only fixed the problem for SOME MacBook Pro users, but those of us with the MacBookPro1,1 models are still tethered to the power outlet.