Interesting articles that enriches validation/quality activities we do, to do differently and smarter.
These consist of tips, suggestions, contrarian approaches and smart checklists etc.
Corners are interesting as they are subtle, invisible really. They could be complex with many things that intersect and therefore display an unique behaviour. They may not necessarily symmetrical at ends, nor be similar to behaviour in the middle.
Why does a complex UI faze a tester? Is it possibly the inability to see beyond the UI, the inability to question beyond the obvious? Too many test cases, the overwhelming feeling that scientific modelling & design cannot be practised due to time constraints are some of the issues.