I am using the latest build. I suspect this issue is also in the stable one. Some of my bookmarks sometimes do not work. When I hit ctrl-somenumber, nothing happens. I noticed that the text editor doesn't have a blinking cursor anymore. Once this happens, none of the bookmarks work anymore. Bookmarks do not work if the text editor doesn't have focus. I loses focus when I hit one of those 'bad' bookmarks. I also get a message like "Could not go to bookmark #7. Navigation failed" when I hit ctrl-7. I see #7 when I hit ctrl-'. The line number it points to exists. I sometimes get a R# exception. I submitted one today.
I hope this issue gets resolved soon. I use bookmarks heavily and they haven't been working solid for a very long time.