I finally got around to checking out the source of MxTube 1.5a’s search bug. Turns out YouTube has decided to add the letter z to the end of their date published strings. I’ve fixed MxTube 1.5a and will be updating Cydia in a few minutes. Once the MxTube feature page shows there is an update available, you can find the fixed MxTube on Cydia. Thanks everyone for notifying me of this issue. NOTE: The patched MxTube will be version 1.5b!