Just noticed this with a fresh install of 2.1. First time trying admin stuff with Opera 9.10/XP.
Added an image using the updated image uploader and all the attributes are displayed in the "Code" view as ALL CAPS. For example:
<a TITLE="e" HREF="http://example.com/wp-content/uploads/2007/01/e7401.jpg">
<img ALT="e" SRC="http://example.com/wp-content/uploads/2007/01/e7401.thumbnail.jpg" />
</a>
Even the hyperlink attributes get capitalized. For what it is worth, doing a normal hyperlink is ok, just when it comes via the image uploader.
If I open the same post with Firefox, and then go to "Code" tab, the attributes are fine (lower-case).
TinyMCE issue? Opera issue?