Comment 19 for bug 501486

I am also (still) experiencing this, I haven't been able to trace the origin myself though. So far.

Currently:
  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
29102 ward 20 0 1510m 1.1g 9868 S 0 38.6 72:16.47 docky

(1.1gig after a few days)

[Info 08:49:10.243] Docky version: 2.1.0 bzr docky r1615 ppa
[Info 08:49:10.254] Kernel version: 2.6.32.24
[Info 08:49:10.255] CLR version: 2.0.50727.1433

Enabled docklets:
Timer, GMail, Weather, Clock
Enabled helpers:
None

I also want to add that I am a heavy user of the timer, using it several times per day for various tasks.
GMail checks every 5 minutes.
Weather every 30 minutes using Weather Underground.