I've been working this one for a while. I found a workaround but still have not been able to fully resolve this problem. It appears to only affect a small number of installs.
Here's the work-around:
- Go to Options->Look and Feel
- Halfway down on the dialog, look for "Items" and set that option to "Open in New Tab"
- Save the options and now try adding/editing ingredients and other items - they should open in a tab
Brad