I just had an odd issue in the D&D F1 thread where I went to upload a picture that is 360K in size on my PC, but appears to be 762K once uploaded, obviously then violating the D&D file size rule. I've not seen this happen before; I do have a habit of re-downloading pictures I put in D&D threads (which are usually just in the F1 thread if anywhere) to double-check the file sizes, which is how I spotted this. I have edited the post since to remove the pic.
IIRC any images you upload to the forums are re-encoded. That's where the size is coming from. The size ballooning isn't super new I don't think, and I don't know if it's considered a bug.
there was a bug in the past with .png uploads re-encoding using a negative compression level and having a hugely increased file size as a result, but that was fixed. Might be something similar happening with .jpg re-encoding.
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