clicking on search result in krunner with mouse works always

this bug is pretty consistent, it is exception when pressing enter works and it's hard to pin down when it works and why
might be somehow connected with speed of typing, I type very quickly  

if bug manifests and "up" key is pressed, krunner switches to previous search keyword, after pressing "down" it returns to current search, afterwards "enter" and "down" keys work correctly

Reproducible: Sometimes

Steps to Reproduce:
1.login into account and wait for things to settle
2.press ALT-F2 and write "sett"  (looking for system settings)
3. press enter 
4. additionally press down key, which is also ignored
Actual Results:  
krunner ignores "enter" and "down" key

Expected Results:  
first search result in krunner should be run on pressing "enter", down should move to second search result

very annoying if krunner is preferred way to launch programs

tested on up-to-date Kubuntu 12.10 + Projec Neon PPA 4.10 RC2