The handling of the clipboard has changed during development. The default Wine clipboard behaviour now is not to delete the clipboard entry inside Wine if you want to copy or paste from an xterm. You may copy and paste from one Wine application to another or into any X application, but not from X to Wine.
The only way to change this behaviour is to change the settings in the Wine configuration file wine.conf or ~/.winrc.
Example 10-1. Clipboard Entry in Wine Configuration File
[Clipboard] ClearAllSelections=0 PersistentSelection=1
If you want to get any marked text from an xterm to an app running with Wine, even if you have already copied something from an application to the clipboard, you may change this to:
Example 10-2. Clipboard Entry in Wine Configuration File
[Clipboard] ClearAllSelections=1 PersistentSelection=0