Adobe is to stop making software tools that allow Apple's iPhone and iPad to use its popular Flash technology.
The decision reverses an earlier pledge in which it said it would help get Flash working on the gadgets.
Thousands of PCs around the world have been paralysed by a security update that wrongly labelled part of Windows as a virus.
The update was sent out by security firm McAfee and made affected PCs endlessly restart.
Apple has shown off some of the 100 new features to be included in the iPhone operating system later this year.
The update includes a mobile advertising platform called iAd that will be used to place adverts in applications made by third parties.