pulseaudio and workrave don't get along

[Twigathy]

While running workrave and pulseaudio, whenever workrave plays a sound it creates a new playback stream in pulseaudio which does *not* go away. In padevchooser's volume controller fiddler I can see a huge list of workrave playback stream controls.

The result of this is no more sound can be played until pulse is killed and restarted, and my logs rapidly fill with messages:
Aug 3 16:06:18 corona pulseaudio[3134]: sink-input.c: Failed to create sink input: too many inputs per sink.

EXPECTED: Workrave to play sounds and pulse not to die because of this
ACTUAL : Pulse dies due to workrave being buggy(?) or pulse being buggy(?)

Potentially useful info:
pulseaudio:
  Installed: 1:0.9.15-4ubuntu3
  Candidate: 1:0.9.15-4ubuntu3
  Version table:
 *** 1:0.9.15-4ubuntu3 0
        500 http://gb.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

workrave:
  Installed: 1.9.0-7
  Candidate: 1.9.0-7
  Version table:
 *** 1.9.0-7 0
        500 http://gb.archive.ubuntu.com karmic/universe Packages
        100 /var/lib/dpkg/status