Which filter(s) break sites ?

[Siamesecat]

I try to find out which filter or filters are causing a problem by looking at the log window while loading the page and reading the names of filters used (in purple print). I disable the filters listed one by one until I see a change in the behaviour of the page. If it is only one filter, that is relatively easy. If there are more than one, it becomes tricky. There is also the debug mode which can be loaded from the log window settings, which show which filters are used and the effects they have on the source code.