Hi Leon!
I don't remember what hardware you have...
Do you have any DAHDI hardware and if so, which?
My guess is that if you have DAHDI hardware it's not hardware which use the Sangoma Wanpipe drivers as you would have the same problem I do...
If you don't have any DAHDI hardware at all I think you can update those safely but if you have anything else wait until both chaser and me report that things are working for them...
Good luck and have a nice day!
Nick