Hi,
I am assuming you are trying to create Google video sitemap?
(e.g. using the "quick preset" that among other things adjust
options ensuring that ".flv" URLs are collected by crawler)
Seems a recent change in my HTML parser code causes this issue

Short version:
I will have a new release very soon, probably public release saturday/sundag.
(Feel free to email or page me directly, and you can probably have it sooner.)
Long version:
What happens is that my crawler extracts text strings found in Javascript code.
For each string, it tries to determine what the content is. (HTML, URL, something else)
For this it among other things invoke HTML parser to see if any HTML is found in the text string.
However, a change in my HTML parser now requires the caller to check
result data in a different way to understand what kind of element was
found (tag start, tag end, comment, doctype, raw text etc.)
...And so this problem slipped through

Thanks for reporting this issue!