I have several changes sets on modifying the same file in the stream, with branching and merge in following ascending order:
o = original
a1-- = at branch 1 <----my current workspace is at this version
--b1 = at branch 2
--b2 = at branch 2
--b3 = at branch 2
m-- = merge a1 and b3, by choosing a1 (i.e. same as my current version)
x1 = add some comments in the file

So, in my pending changes, i can see b1, b2, b3, m, and x1 as incoming.
If i open change set x1 from Change Explorer, i see the comment as expected.
If i open change set m from Change Explorer, i see nothing. I guess this is still normal as version in m = version in a1
But the PROBLEM is:
If i open change set (m+x1) from Change Explorer (by highlighting both), it still shows NOTHING :shock:.... but I suppose the NET change should be the comments in x1?