There are indeed bugs also with the 14.3 MSP XML interface, at least with MSP 2013 SP1 (I don't know about MSP2010). We found that uppercase non-English chars in tasks or resource names (e.g. Ü, É, È) are blank in MSP. This is though resolved in a very recent patch.
In addition, you are supposed to not apply any Microsoft security patch related to MSP after February 2015 (yes 2015) when 14.3 was thoroughly tested. There are different types of issues that might or will happen in case MSP related patches are applied after Feb 2015.