OS - WindowsXP Service pack3
GPU - ATI HD4830
I'm not really sure if this was a bug, but after extensive testing, I think when there are too many variables placed in a family they stop working.
You can see, the events are very simple, but family1 doesn't work while family2 does. I think it also has something to do with the create event as if you remove the create event then family1 will then work.
I noticed this when my new events with pretty much the same code except for some small changes just stopped working. So I used some text boxes for debugging and to further prove this theory I create a blank new file.
Hope this helps.
Tested on both Chrome and firefox (latest)
Here is the capx
dl.dropbox.com/u/57137706/toomanyvarsinfamily.capx
Kind Regards.