I just got FTM2012 and have confirmed that both Tree Sync from Ancestry.com and GEDCOM downloads suffer the same apparent truncation at the 256th character of the value that is placed in the GEDCOM PUBL tag and the same truncated value appears in the FTM Publisher Name field in the Edit Source screen. FTM accepts longer values so the truncation must be happening at the Ancestry server. Ancestry Source Information tends to be verbose but is only displayed completely on the website; it is corrupted on export.
I'm surprised that there has not been an ongoing hue and cry about it. Maybe I'm not looking in the right place or searching with the most common term.
I'm surprised that there has not been an ongoing hue and cry about it. Maybe I'm not looking in the right place or searching with the most common term.