Reflection is bad/wrong. Do you have a white mask over it?

I find when cutting out of a white background, a white glow with 100% opacity and small width works wonders with how the logo looks on dark backgrounds.

For example, this is what your logo currently looks like on a black background:

But with a 100% glow, it looks so much better

and you don't have to worry about lighter backgrounds, as the glow will hardly show up.

Here's the transparent version of the image with glow:

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No problem! =]

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