Macrumors.com has got hold of a list of the bug fixes that iOS 8.01 will address. Among the issues:

– Phone: Addresses bugs with call forwarding and freezing when accessing visual voicemail
– Keyboard: Fixes an issue with keypad not appearing to enter iCloud Keychain verification codes
– Safari: Fixes a problem with videos occasionally not playing
– Sharing: Fixes AirDrop support for Passbook passes
– VPN: Addresses an issue with installing VPN profiles

However, if you are having issues with WiFi on iOS 8, try this temporary solution.

Go into your settings, selecting Privacy, then Location Services, followed by System Services, and then disable Wi-Fi Networking.