Could you please explain why the image name no longer conveys to the title cox that launches the tool tip title?
Tool tip titles cause problems with site accessibility and support for them is being phased out in favour of ALT tags, which the screen reader devices used by folks with visual impairments and others "read" better.
As our developer Ryan pointed out in another thread earlier,
The reasoning behind dropping the title attribute is outlined here:
Basically, we're trying to improve accessibility and play nicely with screen readers.
There is one more fix coming that will improve the alt-caption-title fallback when sending to the editor so that those who invested in title and left caption and alt blank will have their titles show in the alt attribute. http://en.forums.wordpress.com/topic/new-media-upgrade-has-major-flaws-wordpress-support-please?replies=22#post-1081764