Comment 2 for bug 1367814

From what I can tell is that the feature works on desktop, and doesn't work on the device. Text input context menu items are enabled/disabled by an API provided by the Qt upstream. This detects whether there is anything in the clipboard to paste. If there's nothing, it will be disabled.

The clipboard from the toolkit has not been touched since 13.10, and suddenly stopped working. So I suspect the issue is in QtUbuntu.