Since upgrading to 1.8.3, many of our RSS feed blocks now have corrupted titles. The problem did not occur in 1.8.2.
The code on line 262 of blocks/moodleblock.class.php is a starting point for the problem. The problem seems to be that $this->title already contains the hyperlink by the time it is used to form the ALT tag etc.; but I'm not clear as to where $this->title is defined, or what would be the consequences of changing it.
Hopefully someone with better understanding of this class can help?