If you use Regional Rail and rely on a paper schedule, SEPTA is advising that some of the schedules coming out tomorrow, Sunday, December 13th, have errors. This includes the Manayunk/Norristown line that services Whitemarsh and Conshohocken. The advisory from its website states:

Customers are advised that the following paper Regional Rail schedules, with the December 13, 2015 effective date, contain service and schedule errors: Airport, Chestnut Hill East, Glenside/Combined, Lansdale/Doylestown, Manayunk/Norristown, Media/Elwyn, Warminster, and Wilmington/Newark lines.

There are corrected versions of the Manayunk/Norristown line schedule available online in PDF form.