I have been using ID since the beginning and always done the following the same way, only today has it stopped working... perhaps I accidentally hit a command or button.
Selecting several words in a row:
I double-click the first word and (holding shift) double-click the final word. I do this hundreds of times a day. Suddenly, as of a little while ago, when double-clicking the final word, the selection changes from selecting all the text I had selected to ONLY the final word.
Restarted, looked through all the preferences I could think of.
Got it, thanks!
Replaced app preferences and also updated software.