I used an evaluation version till last week.
Was working fine so I decided to buy a Standard License.
Installed during the weekend, I had many problems till I decided to reinstall completely Windows. I have installed SP1
Everything worked fine then, ONLY not one of my SSIS packages still works; I get following error when editing the data flow task
The thread 'Win32 Thread' (0x7e8) has exited with code 0 (0x0).
Unhandled exception at 0x54fc5e89 in devenv.exe: 0xC0000005: Access violation reading location 0x00000000.
Please help, this is a disaster otherwise

Visual Studio crashes when editing data flow task
renyx
Rebuilding the project before trying to open the package solved the problem.
Robert Kozak
Seems to work if I delete datasources and data source views and execute first
Malacki
Hi,
This is not a known problem, and it is unlikely we will be able to diagnose the cause of the problem using the forum (it probably requires real debugging on this machine). Please contact product support services who might be able to work with you to get more information and fix the problem.
Regards,
Michael.