Generated web font doesn't show dots above Ü

I'm using http://www.fontsquirrel.com/fontface/generator to generate my font ready for web. I've set the options to include subsetting of the German language.

In the website I put this: Über WFW Deutschland but when viewed it comes out as Uber WFW Deutschland. Whats weird is that if I view in any IE version it shows correctly. If I switch to any default system font it also displays correctly in any browser.

How can I get my generated font to work correctly?

Update - CSS Code from generator:

@font-face {
    font-family: 'PalatinoMedium';
    src: url('../fonts/palatinm-webfont.eot');
    src: url('../fonts/palatinm-webfont.eot?#iefix') format('embedded-opentype'),
         url('../fonts/palatinm-webfont.woff') format('woff'),
         url('../fonts/palatinm-webfont.ttf') format('truetype'),
         url('../fonts/palatinm-webfont.svg#PalatinoMedium') format('svg');
    font-weight: normal;
    font-style: normal;

}

Solution

After hours of fannying about I found that the option Apply Hinting - Improve Win rendering when ticked was breaking the font. Un-ticked that and reconverted my font and now the font is displaying as it should.

Although the font doesn't look as nice on Windows...