Description of problem:
When the "Updates available" listbox is displayed, one can use the up and down
arrows to move in the list, but the spacebar and Enter keys fail to toggle the
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Click on one of the "Updated xxx packages available" lines.
2. Press Space or Enter: the state of the checkbox does not change.
Fixed in CVS, will be in pirut-1.3.19 or later