We have released a new BytaFont version on ModMyi repo.
This version fixes a bug introduced in BytaFont 1.4 that affects fresh installations only: ‘Restore original’ does not work as expected.

If you had a previous version of BytaFont (e.g. 1.3.4) before updating to v1.4, there is nothing you need to do.
If you installed BytaFont for the first time yesterday (v1.4) and you are experiencing problems restoring the original fonts you should proceed in the following way:

‘I haven’t updated BytaFont to 1.4.1 yet’

• download the package containing the original fonts files according to your firmware (e.g. ‘Original Fonts iOS 5.0.1′) and apply it via BytaFont 1.4
• update BytaFont to version 1.4.1

‘I have already updated BytaFont to 1.4.1′

• download the package containing the original fonts files according to your firmware and apply it via BytaFont 1.4.1
• remove the folder /var/mobile/Library/BytaFont (you may use iFile)

Sorry for any inconvenience!