Hello,
I've submitted a bug report for this, but felt the need to elaborate a bit further.
I updated my client and server to 5.3.1 this morning. I then began to create some new jobs. I quickly noticed that whenever I click an Execute task and click the Execute tab in the dialog box, I immediately get an error. This is both with new jobs and old jobs. It does not occur on other task types, such as Copy Files.
Here is the main exception:
System.InvalidCastException: Unable to cast object of type 'Infragistics.Win.UltraWinGrid.UltraCombo' to type 'Infragistics.Win.UltraWinGrid.UltraGrid'.
Hope this helps.
Mike Biasetti