See this post I made about this issue - it goes in to a lot of detail, and someone else has confirmed in the comments that they experienced the same behaviour:
http://www.drupaler.co.uk/blog/warning-node-module-and-teaser-weirdness/123

Seems node.module does something strange in certain edge cases. =(

Comments

AlexisWilke’s picture

AlexisWilke CreditAttribution: AlexisWilke commented
Issue tags: +teaser

Hi greg.harvey,

If you still have a problem, please check this patch:

#221257: text_summary() should output valid HTML and Unicode text, and not count markup characters as part of the text length

It may very well fix your problem which I guess could very well be a duplicate issue.

Thank you.
Alexis

greg.harvey’s picture

greg.harvey
Primary language English
CreditAttribution: greg.harvey commented
Status: Active » Closed (duplicate)

Wow, it's been so long since I touched this I have no idea if this would fix the problem. Let's mark it as a dupe, unless someone re-opens.