Comment 8 for bug 892394

Yes, can you please convert it to raster (I just tried with Inkscape but the sizing and spacing is completely different to the current logo). It needs to have the same position relative to the top level of the old one to be placed correctly. You can test by overwriting the current one with the following command from a terminal:
$ sudo cp logo.png /usr/share/unity-greeter/logo.png