Help with compile log, not sure what it means

I'm getting these in my compile log, not sure what it means.



"FindPortalSide: Couldn't find a good match for which brush to assign to a portal near (1718.1 1096.0 296.0)
Leaf 0 contents:
Leaf 1 contents: CONTENTS_SOLID
viscontents (node 0 contents ^ node 1 contents): CONTENTS_SOLID
This means that none of the brushes in leaf 0 or 1 that touches the portal has CONTENTS_SOLID
Check for a huge brush enclosing the coordinates above that has contents CONTENTS_SOLID
Candidate brush IDs: Brush 156852: "

Well it's definantely not a leak, I put a skybox around the entire map and it still did it, im not using hint brushes and haven't messed with areaportals..... Based on that link you gave me , it can happen if your brush work is too complicated :x I have some complicated brush work in the map.

Update: Apparently it was some brushes that somehow got off the grid that was causing it...... never seen that come up when stuff has come off the grid... I put the brushes back on the grid and the error hasn't come up on the compile log.