It is intermittent, so this is most likely the reason - I do remember accidentally pulling up the keyboard - so that must have done it. I have to say that there still seem to be performance issues. For example the pull up menu is sluggish most of the time. But I do realize that this is just a SVN release - I am still testing !!
In general I would say that if putting any feature in cause a performance hit, I would say don't listen to me / us . Having a fast application is still the biggest priority in my opinion