We've heard arguments about how they will blow up if you put in self-destruct cluster munitions, and that you don't have a problem with clearance afterwards. What we've found in southern Lebanon is huge numbers of cluster bombs with self-destructs on them that didn't work.
Technical fixes, the kinds of actions you can take to try to improve these munitions, are very problematic. Often these weapons are tested in circumstances in which, of course, they always work in pristine testing areas. What we're finding in the field, after combat, is huge failure rates. The UN is talking about a 40% failure rate. I find that difficult to believe on one level, but that may mean there are something like a million unexploded submunitions littering southern Lebanon. A significant proportion of those will be fitted with self-destructs that did not work.