Scrolling a page using the mouse wheel and the WebView without fixed layout (desktop mode) is not working. I tested this with EFL's MiniBrowser, but had to modify it to set fixed layout to false (EWKViewCreate method in Source/WebKit2/UIProcess/API/efl/ewk_view.cpp). The scroll bars are working, and also the interactive areas of the page. For example, if I hover the mouse on a link it will get its underline, if I scroll a bit, the interaction area of the link will be scrolled but not the link itself.
Closing this bug because the EFL port has been removed from trunk. If you feel this bug applies to a different upstream WebKit port and was closed in error, please either update the title and reopen the bug, or leave a comment to request this.