user interface defect is a high visibility defect and easy 
to reproduce.
Follow the below procedure
1.Reproduce the defect
2.Capture the defect screen shots
3.Document  the proper inputs that you are used to get the  
  defect in the derfect report 
3.send the defect report with screen shots,i/ps and 
procedure for  defect  reproduction.

before going to this you must check your computer hard ware 
configuration that is same as developper system 
configuration.

and anlso check the system graphic drivers are properly
installed or not.
if the problem in graphic drivers the User interface 
error will come.

so first check your side if it is correct from your side
then report the defect by following the above method.
if you still have any doubt mail me:  
rajendra_penumalli@yahoo.com
or call me:9885162742

first i will check my side i.e all are correct or not .
 
 then i will discuss with developer under what conditions 
the bug have to produced and i will give me details i.e 
description of the bug and screen shot of the bug

i will send to the defect through bug report tool with 
screen shots fixed it as a low priority and high severity.