Hi,
since new 1.2.6 version there is a modified web server and communication protocol code that makes amuleweb run nicely and much more faster than in 1.2.5.
Try using the new code for better performances and, in case, to track bugs. In this case, please, post a gdb's 'bt' and a 'bt full' output to help us in bug finding/fixing.
Greets,
shakraw