Issue with "file not supported" on pdfs

Example (uploaded from drag and drop to Gemini pro):

Unsupported file type:

Price_Discovery_and_Convergence_in_Fragmented_Markets.pdf

I’d bet it’s just an inconsistent validator on your drag-and-drop handler—most likely: • The drop zone’s “accept” list or MIME-type check doesn’t include PDFs (or mis-reads the file’s MIME as application/octet-stream) • The attach-button path bypasses that check, so it works every time