Oddities
There seem to be some odd results occurring, adding a note here to hopefully work out what's going on or work out a clearer solution.
Uses Traces Through {{Disambig}}?
The "uses" clause, which should return a list of pages that use a template seems to trace through {{Disambig}} pages and also include those pages. For example, this DPL should return pages with titles prefixed with "Ice" and using {{Problems/WidescreenGCNAuto}}, a template only used on GameCube titles...
<dpl> uses=Template:Problems/WidescreenGCNAuto titlematch=Ice% </dpl>
...but, as seen above returns, a related {{Disambig}} page and a Wii title page linked through the disambig as well as the expected GameCube title result. Only the GameCube title page actually uses the template. Kolano (talk) 18:40, 28 November 2015 (CET)
Title Sorting Broken
Using ordermethod=title fails with a "API error: internal_api_error_DBQueryError" error" breaking all DPL output on the page.
<dpl> uses=Template:Problems/WidescreenGCNAuto ordermethod=title titlematch=Ice% </dpl>