globus_soap_message_serialize.c converts a double to a string by using
sprintf("%E"). From the man page:

       e,E    The  double  argument  is  rounded  and  converted  in the style
              [-]d.dddeħdd where there is one digit before  the  decimal-point
              character and the number of digits after it is equal to the pre-
              cision; if the precision is missing, it is taken as  6

In other words, if the sender specifies an xsd:float or xsd:double as
0.97587222395
what goes on the wire is 
9.758722E-01

One possible remedy is to change the formatting string to something like "%15E"
or "%30E" or whatever people would consider an acceptable precision. 6 digits
is probably too little though.