You are probably aware that the release of the new iOS4 operating system for iPhone and iPod Touch will be available today during the day, via synchronization of your (s) devices with iTunes. For the iPad, We will have to wait until the autumn.
About iNavX, Richard Ray has just written :
iOS 4 should be available tomorrow (21/06/2010). Only apps that are specifically built for iOS 4 will be able to take advantage of multitasking or toggle switching. iNavX 3.1.0 and later will support this feature.
Patience, therefore…
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[Update September 01/07/2010] iNavX 3.1.0 is available on the AppStore.
Uhhh, I did the Ios4 update on my iPhone 3 GS and since, problem, the phone systematically cuts out after 4/5 Talk minutes, Black screen plus Apple … a correction 4.0.1 is announced and in the meantime I'm saving money … Nice bug anyway …
The problem is that this kind of malfunction is random, and does not affect all devices. I didn't have any problems with mine, but it's true that I practice rather short conversations with the mobile.