Found this recently, wasn't fixed in last firmware update so I assume its not tracked/found yet.
Running firmware from 2014-11-27 04:11 (image 4.3 kernel 3.6.0 oe-core 4.3)
Press 'menu' button.
Choose 'autotimer'.
Press 'menu'.
Choose '6 setup'.
Arrow down to 'only poll while in standby'.
The left side 'note window' has a typo at the end of the displayed text: "When this is enabled AutoTimer will ONLY check for new events whilst in stanadby."