Push notifications are broken at the moment (for versions 1.9.6, 1.9.7 and 1.9.8). A new version has been submitted to Apple to fix this issue.
v1.9.80 should be approved soon.
Apologies for the inconvenience.
HKWarnings v1.9.8 is ready for download.
– Bug fixes
– iOS 4.0+ only (code tidy)
– New loading messages
NOTE: HKWarnings now only runs on devices running iOS 4.0 or greater. If you are running iOS 3.x, iTunes will not let you upgrade, but if you have, for example, two devices, one running 4.0+ and one running 3.x, if you upgrade on the 4.0+ device, when you next sync your 3.x device, HKWarnings will be removed from the 3.x device. This is an iTunes ‘feature’ I’m afraid.