Running 3.7.2E and getting the exact same issue as described in the original bug. All of the VTY lines were being used, all with the same date/time of being idle. Lines cannot be cleared. Was able to access via a USB console. Did a show run | and...
Tried cat3k_caa-universalk9.SPA.03.07.05.E.152-3.E5.bin, problem still persists. Going back to latest approved of cat3k_caa-universalk9.SPA.03.06.06.E.152-2.E6.bin to see if that helps.