"Please see this":http://picpaste.com/pics/sample-I344FsxY.1381040751.png

Now, you can understand what I'm speaking about.
This does not happen normally when the application is active and using. But, When I minimize the application & maximize it after some time, I observe this frequently.
There are three "unknown" lines in the picture. Out of which First one is blurred out and the other two are good. All the three are made using Glow element in QML as in below:
@ Text {
id: title
color: "#b2f3ef"
visible: false
font.family: "Calibri Light"
font.pixelSize: (mainRectangle.height - cover.height)/3
text: "Unknown"
}
Glow {
source: title
anchors.fill: title
radius: 8
samples: 16
color: "lightblue"
transparentBorder: true
cached: true
}@

The text is actually set dynamically from a C++ program. I dn't think this is an issue of redrawing. Bse i have seen this happen even when there was no text change before minimizing & after maximizing.
Hope someone knows which is causing this issue.

Thanks in Advance,
inblueswithu