Enter in the IPython console inserts new line instead of executing current line after kernel restart

Recently I updated my anaconda package, which installed

ipython 4.0.0
ipython-qtconsole 4.0.1
spyder 2.3.6

After that, whenever I restart the ipython kernel in the qt-console (using ctrl + .), the console will not execute any command, e.g.:

Python 2.7.10 |Anaconda 2.3.0 (64-bit)| (default, May 28 2015, 16:44:52) [MSC v.1500 64 bit (AMD64)]
Type "copyright", "credits" or "license" for more information.

IPython 4.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.
%guiref   -> A brief reference about the graphical user interface.

In [1]: 1
   ...: 

I cannot reproduce this behavior when running ipython-qtconsole outside spyder, i.e. it works as expected. My current workaround ist closing the console, thus killing the kernel, and load a fresh one.

[Fishyman]

if you hold down shift and press enter it works fine (although not what we want)

[ccordoba12]

We are planning to release Spyder 3.0 (which will contain this fix, among many other things) next month 😃