We have two portals:
1) 'Main' Portal - 7.31 SP6
2) BI Portal - 7.4 SP8
We use application integration from our main portal in order to run WAD7 reports in the BI portal.
Sometimes, when we run WAD7 report, a new window/tab with 'about:blank' is opened (in addition to the WAD7 report that is opened successfully).
What is the cause of the 'about:blank' window/tab and how can we prevent it?
Our browser is IE9.