[Qt-interest] Meaning behind Qt3Suport Module Warning (Troll input needed)

[Miller, Douglas K. CONT NAVAIR 2109, 1, N139]

Qt4.6 has the following in the Qt3Support Module documentation:

"Warning: The classes in this module are intended to be used in
intermediate stages of a porting process and are not intended to be used
in production code."

Earlier versions of Qt4 did not have this warning.  Is this warning
because it has stability issues or because the Qt3Support module will
soon be withdrawn?  Also, can you tell me when the Qt3Support will be
removed from Qt4?  We are in the process of converting a large project
from Qt3 to Qt4 and we were planning on using the Qt3Support module as a
stepping stone.  In other words, the first release after conversion will
have the Qt3Support module in it to cover the areas that we did not have
time to get to.  The warning is new to me and it makes me think that it
cannot be used that way. Can you help us understand this warning better?