Hi Jorge, & jarretC
I have done nothing new like plugin install or change of any .CSS script or changed any of my .php files. The problem happened just one fine morning.
It's a single install I have just two websites in my FTP bothe use different themes and different WordPress installations.
I had changed htaccess file in order to increase memory allocation as was suggested on a different thread on same topic. http://codex.wordpress.org/FAQ_Working_with_WordPress#How_do_I_Import_a_WordPress_WXR_file_when_it_says_it_is_too_large_to_import.3F
That did not work so I reverted to the old file. And my website worked fine but WordPress deshboard had the same problems.
The same problem had happened before and it solved itself within hours or a day...so I thought its happening because of slow Internet but it's been a week now and my dashboard is not back to normal. It's definitely not a slow Internet problem because I have checked it on few other places to confirm this.