"This worked perfectly on the old installation": What I meant is, that the data in the form field (i.e. binary data mixed with plain text) was in the variable requestContent as it was sent by the client.
"What failed to work": In Coldfusion10 on Suse Linux, the binary data is not anymore as it was sent by the client (altough the plain text part remains correct). Some bytes (of the binary data) are dropped and the others are changed.
"What did you expect": As described for the old installation.
Thanks for your help
Pedro