@Kartik i know that but you are not getting the question. I had installed kde4.2.2 when kde 4.3 was just about to come....But after when it came , Synaptics or apt didn't upgrade 4.2 to 4.3..even on manual checking of update , they said 'your kde packages are uptodate' and thats with others too.. So, I wanted to know the reason behind this... As if canonical is still not supportng 4.3 in jaunty or anything else...
My question is WHY not HOW (first step is Googling always)...Why it is not included in original repo list
Similar case is with firefox update too, it is not giving option of updating to 3.5. As a result , i m running the tar of the newer version ..but the installed one is still 3.0.15
@Rony : I m not a linux newbie, have been using it for 1.5 yrs now (so little above newbie) and have solved all types of problems whether it is non-functioning of alsa, or compiz graphics prob in hardy or to make wine from source etc etc.. by intensive google searching.....