Possible Clues:

• Refurbished a flat and it's deadly
• Obese Bert bringing about demise
• Ruinous, as some flaws
• Following a story that has no end is disastrous
• Catastrophic, as a mistake
• Word before 'flaw' or 'attraction'
• Like some Windows errors
• Calamitous drawing in picture
• Like a major flaw
• Deadly, as calling Capone this might well have been!