I had this problem on my test machine a few weeks ago. I used the NO_CHECKSUM flag and installed it without problems, the system has functioned perfectly well and worked as a sshfs client without any problems.
Like jb_daefo just said, the dist files were
rerolled on the 24th. A quick update of the ports tree tomorrow or just sysutils/fusefs-kmod files should fix the warning. When you have problems like this, it can be a really helpful to check the CVS commit logs.
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Thou shalt check the array bounds of all strings (indeed, all arrays), for surely where thou typest ``foo'' someone someday shall type ``supercalifragilisticexpialidocious''.