API changes in IntelliJ IDEA 14 (Cassiopeia)

Icon

Problems upgrading your plugin to 14? Please ask in forum.

There can now be several VirtualFile instances corresponding to the same file, so one should use equals instead of == and avoid identity and weak maps/sets.
CacheUpater is deprecated, DumbModeTask should be used instead
InspectionProfileEntry implements com.intellij.codeInspection.BatchSuppressableTool; in order to implement suppressions for a new language one needs to implement com.intellij.codeInspection.InspectionSuppressor
ASM 5 is used by default; prefix was changed to org.jetbrains.org.objectweb.
TypedHandlerDelegate implementations are invoked now automatically for each caret