Using my USA MacBook in South Korea

Okay. I bought my second iBook six months ago, and I am so pleased with it. I only have an adaptor to use here in South Korea, and it seemed to work just fine without the voltage adaptor. I have been here about a month now, though, and have recently noticed some warpage around the casing where I attach the charger to my computer. The area gets warm when I am charging it but not unduly so. Just warm to the touch.
I have arranged to get a voltage adaptor sent to me in the next week, but I do not know that this is the problem. I know a few other people who have computers--Apples, too--and they only use adaptors without voltage convertors.
Any thoughts or ideas? I will be so grateful...
Heather

Just noticed your posts says MacBook in the title but iBook in the text. The following answer is for the MacBook.
A voltage adapter is a waste of money on the MacBook. The magsafe adapter is rated for 100 VAC to 240 VAC. The only thing required is a plug adapter for the country you use it in which you said you have. The heat is fairly normal from other posts on the subject. MacBooks usually run around 60º C for normal usage up to 80º C for CPU intensive work. Check this link for more on heat issues. Apple Notebooks: Operating Temperatures The area you mention is near the CPU so it generates the most heat there.
The warpage could be from the heat but may also be a problem with the case. You could talk to apple about it if you are concerned with it.

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