When making changes to websites that I manage I will check how pages render using the 3 main browsers.
Using IE11 after a long session Safe Web starts to mark the pages as suspicious despite being happy dozens of times in the same session up to this time.
I can restart the whole cycle again by closing and restarting IE11. The real work around has been to use InPrivate browsing.
The other requirement that these false positive alerts raises is a simpler way to signal that these pages are clean.
There should be a button on the page or does the "go there anyway" click get logged?
I have suffered with this on and off for months.