Prior to Appleshare protocol versions shipped prior to OS X both reported volume size and volume free space are reported as 4 byte unsigned long integers. Thus the maximum reportable filesystem volume size is 4GB. (If you do more Googling you'll find the limit is 2GB prior to system 7.5.) Assuming the particular server is otherwise protocol compatible with an older client it will probably work fine but size and free space will be incorrectly reported on the client.
(Netatalk contains an option to specifically cut off volume size reporting at 2GB for older clients.)