WordPress tiny MCE editor disappears to author/editors, remain in admin user role.
Plugin version: 0.9.9.3.4, WordPress version: 3.1.2
Problem: MCE editor disappeared in every user minus the admin user. After disabling Frontpage Slideshow plugin MCE editor was instantly reverted to working condition to the affected user roles (author, editor, contributor).
Notes: I found the problem the next day I have installed the Frontpage Slideshow plugin after the editors of our website started reporting that the MCE editor is missing leaving them unable to post correctly. When I (as admin role) went to check the problem, the MCE editor appeared correctly.
When I accessed the post editor under different user roles (author, editor, contributor) the MCE editor was not functioning (empty of buttons).
After googling the Net for several hours I have found reports (in comments) about other people being affected by exactly the same problem.
Current Status: Problem unresolved. Had to uninstall it.