nsString

Hello.

I built a browser with gecko 1.8 . It worked fine.
Now I try to use gecko 1.9.2.23. I get some conversions problems

For example:

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nsString attributeName

char* attrName=ToNewCString(attributeName); causes an error : cannot
convert parameter 1 from 'nsString_external' to 'const nsACString &'
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Is there a doc about such conversions in 1.9.2.

Could you help me ?

Thank's

philippe