SSRS report view blur when scrolling

Problem is resolved.

Issue was due to browser compatibility view which was set to IE5. I changed SSRS report viewer file located at Microsoft SQL Server\MSRSXX.MSSQLSERVER\Reporting Services\ReportServer\Pages\Report.aspx

added meta tag:

 <meta http-equiv="X-UA-Compatible" content="IE=edge">

to force browser to render in latest version available.