> We have encountered a small problem with the ada-mode and emacs 22.
 > When an Ada file is visited in emacs (in this case, I find this file
 > with M-x find-tag) and this Ada file is a read-only file,
 > we see an error message appearing in the mini-buffer/*Messages*:
 > File mode specification error: (buffer-read-only #<buffer flight.adb>)
 >
 > After investigation, we see that this error message is produced
 > by ada-initialize-properties.

I've been looking into this and noted that handling syntax-table
properties seems completely broken unless done by font-lock.  Could you
please try the attached patch and tell me whether it gives good results
with font-lock-mode enabled _and_ disabled.  Thanks.