Summary:
If a user opens an search select advanced find screen within another search select advanced find screen, both will close.
Symptoms:
When the user tries to open a child find window from another child find window both windows disappears and the user is taken back to Main Find Screen.
Status:
This issue has been fixed in Sage CRM 7.2g which is due for release at the end of December 2014
More information:
This is not an issue on Google Chrome