[Gambas-user] Circular references?

[Richard]

WARNING: circular references detected
FSidePanel (1)
FDirChooser (1)
SidePanel (1)
DirChooser (1)
ListContainer (1)
FileView (1)
DirView (1)
WARNING: 38 allocation(s) non freed.

I have been working with 1.9.47 and trying to get it to produce the same 
results as I get from 1.9.46a when I compile a program which used the old 
TableView and now uses the new TableView.

There are some differences in the events generated which cause my program to 
do unexpected things and in trying to nail it down I have managed to generate 
this error(?) when the program exits (running it in the IDE).

Question 1: What sort of "circular reference" is the warning talking about?
Question 2: Why are these particular objects listed? 
Question 3: What does the number in brackets mean?
Question 4: Is it serious?

Only one of the objects listed has been used on my program's only form; 
DirChooser. I'm not sure if I even recognise the names of the others.


Richard