Advanced MMS settings and the new update
This may be specific to Telus Mobility but thought I would let the community know:
Those who are thinking about upgrading to build .4181 for the Q10 should make note of your advanced MMS settings. I upgraded to this build the other day and I am quite happy with the changes (despite the white calendar) but did waste a day trying to figure a problem regarding failure to send/receive MMS messages. My initial call to Telus and BlackBerry were not helpful as both companies pointed the blame at each other resulting in no resolution.
This seems to be a specific BlackBerry OS error but it does wipe out the advanced MMS settings of your carrier which is what is causing the error to occur. I made a thread in the BB Q10 lounge for those interested in reading what happens but be warned... make note of your advanced MMS settings (MMSC URL and PROXY URL) prior to updating to ensure if you have a similar problem, you can easily fix.
Good luck!