For example, I caught this one just now:
In the first quote, the markup has been inserted as plain text.
The second quote has worked OK.
Another frequent bug is that attribution is highlighted as a quote, but the quoted text is outside the highlight.
I guess this goes wrong about 50% of the time?
This has got very much worse of late - despite general forum performance having improved
The behaviour now seems to be (almost?) entirely consistent:
awneil said:include the end of a sentence), the quote will fail
This is why, for example, if you look at my replies in the forum where I quote a question from previous post, the question mark is always missing.
If the selection includes right up to the end of the sentence (whether it's a question mark or not), the quote will be broken.