It seems that this problem is resolved in kde 3.4. After upgrading I don't have
this problem.

No, it's not resolved. Quitting and restarting aKregator has the same effect,
window is not maximized.

CVS commit by rytilahti: 

Uhh, that was ugly... Resizing manually if no size was provided by argument.

BUGS:102359


  M +0 -4      akregator.cpp   1.85


--- kdepim/akregator/src/akregator.cpp  #1.84:1.85
@@ -95,8 +95,4 @@ MainWindow::MainWindow()
     m_statusLabel->setFixedHeight( statH );
     statusBar()->addWidget (m_statusLabel, 1, false);
-   // disable the action because we don't have a handbook yet, hope this createGUI doesn't broke anything
-
-    if (!initialGeometrySet())
-        resize(875,700);
 
     setupActions();

CVS commit by rytilahti: 

backport for 102359

CCBUGS:102359


  M +0 -3      akregator.cpp   1.81.6.3


--- kdepim/akregator/src/akregator.cpp  #1.81.6.2:1.81.6.3
@@ -100,7 +100,4 @@ MainWindow::MainWindow()
     if(action) action->setEnabled(false);
 
-    if (!initialGeometrySet())
-        resize(875,700);
-
     setupActions();
     createGUI(0L);

We should probably re-open this bug, since Akregator does not remember window
size/position on subsequent opens.  In my case, I size it normally and use it. 
If I close it and re-open it, I get 1920x1200 of Akregator.  Not what I wanted!