Speakup with doubletalk synth occasionally doubles key echo.

[Tom Fowle]

Hi folks,
Running Debian wheezy with a doubletalk PC card.
Occasionally keystroke echo speaks individual letters twice as I type.
Everything else is proper, nothing else is doubled.
Turning speakup off and on again does not resolve the problem.  Neither does
killing speakup with the "pause" key.
Reboot does fix it.
Anythoughts?
Thanks
tom Fowle