meta_query doesnt support "empty" values
|Reported by:||dd32||Owned by:|
Basically, a meta_value of '0' is ignored in meta queries, It bases it on empty(), so a meta value being "empty" is ignored.
This mainly comes into play for numeric comparisons, ie. field >= 0 (do not want -50 etc)
Code: Line 423 change from empty() to strlen()?
Core includes a hack to work around this already