otf fonts are zipped each time

Hello,

I’ve got some .otf fonts wich I stored in /usr/share/fonts/otf

Each time, I don’t know when and how, all fonts are zipped as .otf.gz and I need to gunzip * to get them back. When they are stored as .gz, they don’t show up with openoffice or gimp.

Why did this happend and can I stop it?

Thanks.