Anyone else run into this on i386?

Happening about every 24 hours on this rather busy webserver.

        uvm_fault(0xc033ea20, 0xc0245000, 0, 2) -> e
        kernel: page fault trap, code=0
        Stopped in pid 10 (ioflush) at  genfs_putpages+0x46c:   movw    %bx,      0x28(%
        esi)
        db> Kerberos:No default realm defined for Kerberos!
        No such command
        db> 
        db> t
        genfs_putpages(e594de10,c1529340,c14da200,e594dde0,0) at genfs_putpages+0x46c
        ffs_putpages(e594de10,c14da200,c1529340,e594b1d0,0) at ffs_putpages+0x11d
        VOP_PUTPAGES(e6267730,0,0,0,0,11,e50fb580,e594de80) at VOP_PUTPAGES+0x49
        ffs_full_fsync(e594df28,a5,0,c0180010,0) at ffs_full_fsync+0x98
        ffs_fsync(e594df28,0,e594df2c,c035c6c0,ffffffff) at ffs_fsync+0x3c
        VOP_FSYNC(e6267730,c134df00,8,0,0,0,0,e594b1d0) at VOP_FSYNC+0x58
        sched_sync(e594b1d0) at sched_sync+0xb1


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