When I select a word by double-clicking on it and then hit either the left or right arrow key, I expect the word to be deselected and the caret to end up at the start or end of the word. This isn't what TM [Version 1.5 (906)] is doing for me now, and its breaking a macro I'm trying to create.
It appears that hitting an arrow key with text selected by double- clicking puts the caret one character to the left or right of where the double-click happened. No other current Mac program that I use does this, nor can I remember any other Mac program ever behaving this way (going back to 1985). So, unless I've inadvertently changed some setting to start this behavior, I would call this a bug.
FYI, the arrow keys work as expected when the selection is made by swiping or shift-clicking.
-- Dr. Drang