sqlite plugin anomalies on ios

We are having issues on iOS devices, we are using some cross platform libraries, jsonfx and mono data sqlite.

We are doing some db reads, and writes, than suddenly the app crashes at some random part. The crash log sucks, all we have is this:

we are iterating over items in db, then suddenly:

 System.String doesn't implement interface System.Collections.IEnumerator
 * Assertion: should not be reached at mini-trampolines.c:183

We are starting network communications, then suddenly after some random debug.log lines:

 * Assertion: should not be reached at mini-trampolines.c:183

We have hit a brick wall, have no idea what is going on. This error only happens on iOS, the code runs fine in the editor, and on android devices too.

Help would be greatly appreciated!!