Wierd user agent strings

[Tim Bunce]

Does anyone know what User-Agent strings like these may mean:

  (r\177xx\303\203x0\226H
  (r\177xx\303\203xT\365G
  (r\177xx\303\203xt]D
  (r\210xP\223G
  (r\210x\354\250D
  (r\210xx\303\214xH?E
  (r\210xx\303\214xP+E
  (r\210xx\303\214xXCE
  (r\210xx\303\214x\$EE
  (r\210xx\303\214x\204VF
  (r\210xx\303\214x\204yG
  (r\210xx\303\214x\20\256E

(where \210 etc are octal character values).

Tim.