I've been using IcoMoon for quite some time and I've never had a problem until now. :) I'll describe in more detail. I created Washicons (lucijanblagonic.github.io/Washicons/) in Illustrator and normally export it as SVG (same as on other projects). I have this strange "fill" bug in the final export file.
1) Take a look at this icons (screenshot 1 https://dl.dropboxusercontent.com/u/44771/icomoon/import.png) - I import them into IcoMoon with no problem.
2) Next step (screenshot 2 https://dl.dropboxusercontent.com/u/44771/icomoon/export.png) I prepare them for export and everythings is still fine.
3) When I actually download the font file, I have this weird bug (screenshot 3 https://dl.dropboxusercontent.com/u/44771/icomoon/font.png) where the center of the icon is filled with black.
I have no idea why. :( I tried several tests but SVG seem fine. Also, I tried it on other Font generator service (fontastic.me) and there the final result is as it should be (that's the font file I currently use). You can recreate the bug with these icons https://dl.dropboxusercontent.com/u/44771/icomoon/icons.zip (32px grid) I'd rather use IcoMoon TBH because it has a better management interface and I like the final expport zip file more.
Any ideas? :/
Thanks,
Lucijan