file setup in network rendering

I've created a small network with 4 rendering nodes, one manager and one 
computer which is both client and server. Wehn I render, I found out that there

is a difference in the file format setup between the images rendered 
locally and the ones rendered on the dedicated rendering nodes. 

for example, when I rendered JPG files, I set them up to use the best quality 
setting (12) and on my local machine this is what it did, but on the 
server nodes the files were saved with default quality. 

The same happened with TGA files: I specified 24bit files, but the servers 
rendered 32 bit files.

is there a fix for this?