tor should not stop for a change of the config value DisableDebuggerAttachment
If the config value DisableDebuggerAttachment is changed (to let arm show the inbound/outbound connections at page 2 of the arm tool too, otherwise just circuits are shown) and tor is advised to re-read the config file, it stops with :
Nov 11 19:33:44.000 [warn] Failed to parse/validate config: While Tor is running, disabling DisableDebuggerAttachment is not allowed.
Nov 11 19:33:44.000 [err] Reading config failed--see warnings above. For usage, try -h.
Nov 11 19:33:44.000 [warn] Restart failed (config error?). Exiting.
This is a bad behaviour in my eyes.