I cannot tell when exactly this happened, since I rarely pay attention to which particular technique I’m using when editing text. But a couple of minutes ago I discovered that Drag&Drop no longer works in EE: neither text, nor tab headers.
The option “Enable Text Drag and Drop” is turned on. I tried to turn it off, restart EE, and turn the option on again — did not help.
Version is 9.15 x64, OS is WinXP x64 SP2.