I have what sounds like a similar problem.
Mine is a brand new installation.
I can do everything (upload photos, select from gallery, right up to the point i click to ‘insert into post’
Then I get a blank page. The URL at that point is:
[wp_root_folder]/wp-admin/media-upload.php?type=image&tab=library&post_id=xx where xx is a number
Any ideas?
I could post fine for the first day or so. Then this. Have tried various browsers and all the releavnt steps, i think, on the sticky page in the forum re: problems with image uploads.
Still no luck.
Suggestions appreciated.