[Zope] Installing Products with Errors in Zope 2.7.4

Hi, I'm currently testing out Zope 2.7.4, and Zope's behaviour when installing new products seems to have changed from 2.6.4 (my previous version). Whenever I install a product with errors Zope crashes (ie. zoperun throws an exception, shows a traceback and stops, zopectl tries to restart Zope every few seconds). Zope 2.6.4 would start as usual, and show an error message in the Products screen. Is this the normal behaviour in 2.7.4? If so, why? Bert Vanderbauwhede