The shortcut Ctrl + Alt + A is no longer working. I already set in Window -> Preferences -> General -> Keys the value "Show Annotation..." to Ctrl + Alt + A. But it's still not working. It's still possible to use Right Click in file -> Team -> Show Annotation...
make sure you have no conflicts in the bindings Example: Show Annotation + Show in (SVN Annotate). You do not want this
make sure the action set "SVN" is available in your view:
window -> perspective -> customize perspective. Tab: Action Set Availability. Check SVN Checkbox svn in action set availability