I have encountered the 'q' bug several times, without any apparent cause. Normally, one needs to type Cntl-q to open the Quick Search dialog. The 'q' bug is when typing the letter q opens the dialog (without holding down the Cntl key). This makes it impossible to use any words with the letter 'q'.
The solution to the problem (until they come out with a fix for the bug) is to follow this procedure:
- Press and release the Cntl key one time.
That's it! Operation should then work normally.