First thing what I saw is, when I open a grouped set (clicking on +), which was downloaded completly before, only the first .rar file shows as downloaded.
All other files in the set have the status "idle/old [1 file]". Is that a bug or a feature?
In the past, all files from the set showed up as downloaded. RC5 had that too, but I think not on all sets as now, only on a few.
Second thing is when you open such a grouped set and close it, the last line of the set is not deleted from the list.
So everytime you click on + and close, click on + and on close, you get a new line (the last line from inside the set).
+ group 1
+ group 2
So clicking on + of group 1 you get:
group 1
group 1 file 1
group 1 file 2
+ group 2
then after close you see:
+ group 1
group 1 file 2
+ group 2
A new click and close and you get:
+ group 1
group 1 file 2
group 1 file 2
+ group 2
And so on...
Update:
RC6 has downloaded a set now and all files in that set have status "Downloaded [1 file]".
When I open the set with + and close it, no line is added to the list.
It seems to happen only with older downloaded sets, where only the first line shows "Downloaded [1 file]" instead for all downloaded files.