After upgrading to version wl500g-1.9.2.7-d-r566 of Oleg's Firmware my forum (mybb) is loading awfully long comparing to earlier version. Also in log i found this
Code:
15:46:37 dropbear[385]: exit after auth (admin): error reading: Connection reset by peer
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/1)
Sep 16 16:07:23 kernel: __alloc_pages: 0-order allocation failed (gfp=0x20/0)
Dunno what may cause this 
P.S. After upgrading to wl500g-1.9.2.7-d-r587 (2009-09-17) there are still problems with page time generation.