Kile's 1024 character line limit

For some reason Kile (and Kate?)has a configurable line length limit.

When editing .tex documents its easy to exceed the default of 1024 characters and if you open a file with lines longer than the default it gives an error and sets the document to read only.

Go into settings->Configure Kile and select Editor->Open/Save set the line length limit to 0 and there will be no limit.