Fixed by Natfoth July 17 2012
Location: The Escape From Durnholde instance, in Tauren Mill inside the Inn. Bot can not path inside and upstairs.
[4:18:18 PM:000] Loading HillsbradPast_31_28
[4:18:18 PM:139] Loading HillsbradPast_29_28
[4:18:18 PM:259] Loading HillsbradPast_32_27
[4:18:18 PM:400] Loading HillsbradPast_32_28
[4:18:18 PM:497] Loading HillsbradPast_28_27
[4:18:18 PM:620] Could not generate full path from {2637.446, 663.7533, 54.66746} to {2646.021, 667.6945, 56.48886} (time used: 1.341 seconds)
[4:18:18 PM:777] Could not generate full path from {2642.274, 666.9498, 55.17022} to {2656.554, 671.8909, 57.17242} (time used: 13 milliseconds)
[4:18:18 PM:979] Could not generate full path from {2641.74, 669.0975, 54.91682} to {2657.671, 672.9077, 57.49699} (time used: 15 milliseconds)
[4:18:19 PM:274] Could not generate full path from {2644.2, 672.4674, 55.14383} to {2659.252, 674.3495, 57.62843} (time used: 14 milliseconds)
[4:18:19 PM:674] Could not generate full path from {2647.41, 677.0215, 55.54059} to {2658.655, 676.0383, 57.65187} (time used: 14 milliseconds)
[4:18:20 PM:682] Could not generate full path from {2651.766, 683.2004, 56.01712} to {2654.59, 674.0256, 59.47387} (time used: 13 milliseconds)
[4:18:20 PM:919] Could not generate full path from {2652.662, 682.1469, 56.38645} to {2653.834, 672.8132, 60.35939} (time used: 15 milliseconds)
See screenshot attachment.