frequent crashes on resume

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

I frequently get system crashes on resume:

        kernel debugging assertion "ci->ci_fpcurlp != l" failed:
        file /usr/src/sys/arch/amd64/amd64/fpu.c, line 264
        ...
        stopped in pid 801.1 (gtk-gnash) at netbsd:breakpoint+0x5: leave

This is amd64-4.99.73 on a Thinkpad T61.  Is anyone else seeing this?
(I haven't been able to get a crash dump; when I type 'reboot 0x101', it
says "syncing disks" and never comes back.)

                --Steve Bellovin, http://www.cs.columbia.edu/~smb