Problem with Borders Around Images

Hello –

I have noticed something odd on my blog postings & page texts… whenever I insert an image (using the WYSIWYG editor), then any images I set to be aligned RIGHT always have a thick gray border around them. When I check the HTML there is no border code at all. Furthermore, if I go back to the WYSIWYG and selct the image and then align it LEFT & publish, the border goes away. Any ideas? This is truly annoying!!!

Thank you!