No. But, you could try switching to plain text compose mode, pasting and then switching back to HTML compose mode. Do't know if it'll work as intended, but it might be a tad bit easier than doing the text editor way.
Your version? What source downloaded?
System parameters like enough disk space?
Since when it started? Does it start in a particular situation?
What's your antispam?
Open them all - in dozens, for example, Opera's history shall most probably remember them, and then will predict when you're creating the new list. It's so with truOpera, at least.
Maybe the covert idea of changing Opera's path was to re-introduce us to handwork, huh? π