Try without the quotes, seems to work then
Edit: Although they shouldn't, all browsers seem to display
HTML Code:
<img src=/wp-content/themes/atahualpa3/images/myimage.gif />
just fine.
(Note the missing quotes)
P.S.: The more tag is prepared to deal with visible quotes, i.e.
HTML Code:
Continue reading "......"
To display them correctly, it'll turn single and double quotes into ASCII codes.