To urge Kobo to fix their latest buggy firmware release contact and notify them about all found bugs in their latest firmware release. If they take customer care seriously they'll be very pleased to hear from you.
Just write in your native language to one of the following email addresses:
Australia/Canada/Ireland/New Zealand/UK/USA:
help@kobobooks.com
Deutschland:
hilfe@kobo.com
Schweiz (Suisse):
hilfe.ch@kobobooks.com
Holland:
help.nl@kobobooks.com
France:
aide@kobobooks.com
Italia:
aiuto.itl@kobobooks.com
Espaņa:
ayuda.es@kobobooks.com
Portugal/Brasil:
ajuda.pt@kobobooks.com
Japan:
お問い合わせ
South Africa (Suid-Afrika):
picknpay@kobobooks.com