On behalf of Stuart Bishop:
Dragging with my touchpad has become much more difficult under Oneiric. It works, but it seems much stricter and rarely is my double-tap and drag good enough to initiate the drag. It seems now that I need to start the drag immediately after the touble tap. Wait too long and it fails. Start the drag too soon and it fails (the drag is absorbed into the double tap?).
As I've said on the Launchpad bug report:
There are more actions than just the dragging action that require the left mouse button to be held down. There's also the up and down arrows on scroll bars, or numerical input widgets with up and down arrows. To simulate holding down the left mouse button you are supposed to (Tap) + (Press and Hold). When holding the button down on the mouse to keep a button on screen pressed by the cursor, you are obviously not supposed to drag the mouse around. By extension, dragging itself shouldn't be initiated by dragging the finger, the drag should be initiated by the simulated holding down of the left mouse button, which should be the (Tap) + (Press and Hold)
whoah, that one flew under the radar. sorry for the silence. it's been two years, I'm gonna close this now as fixed (latest master has a bunch of fixes here), please open a new bug if this persists.