The implementation of the pseudo clipboard mouse functions, ie. Control Drag and Shift Drag are not consistent across all applications within Ubuntu.
Example: Open Office
Within Open Office Writer you can select text, hold control and copy the text to another location within the document.
Within Open Office Draw if you drag an item while holding the control button it only moves the item.
I am not particularly fond of the colour picker in Open Office as it is not simple to pick a colour, you need to add it to the palette before it can be used. Why not have a single unified palette that any application can plug into.