Recent mouse click problems

All, Using git, creating fresh package sets frequently the past many days. Recently my mouse is not working correctly. I don't know whether the problem is me, the mouse, X, or Trinity. I don't think the mouse because I have tried two different devices. The recent problem is a single click does not always function like a single click. Sometimes the single click acts like a double-click and sometimes a single click does nothing at all. For example, single-click selecting an app icon in the taskbar or the launcher menu button might do nothing at all. I have to click again. Sometimes a single-click on a file opens the file rather than just selecting, like a double-click. Another problem is click-and-drag does not always hold. That is, I click-and-drag to select a snippet of text but when I release the mouse button the selection highlight disappears as though I single- clicked outside the selected area. I have the double-click time configured to 700 msecs (fairly slow) and I have tested different times. I have double-click set as the default icon selection action. I don't want to use a different desktop for a day or two to decide whether Trinity is involved. Has anybody else experienced these or similar events of late? Any ideas? Thanks. :-) Darrell