Briefly, G3 266MT/MacOS 8.5 ethernet networked via simple 5-port hub to a G3 300MT/MacOS 8.1 (with G3 Ethernet 2.04 update).
The two machines can see and connect to each other, but when copying files (connecting from the 266 to the 300, copying to thr 300) the copy progress box opens up, the cursor changes from pointer to a watch, and despite being able to move the cursor, the machine needs a force-restart. This in turn causes the 300 to crash.
Cables are fine, the hub is fine.
What can be wrong? :)