Same issue here.
Went from DCD 3.2.5 (GPS working) to new Telus ROM (GPS worked for a while then quit).
I re-installed DCD 3.2.5 and GPS still not working.
I then installed DCD 3.1.6 + Telus carrier cab and everything is back to normal now.
Registry settings...
HKLM\software\htc\supl agps...