The next Namecoin block,
99502, has a size of 52606 bytes. In order to allow 99502 (and subsequent blocks) to be imported into the Abe database, I dropped the txout_detail view (because PostgreSQL does not allow changing the column types in tables used by views), removed the length restriction from the column txout_scriptpubkey in the table txout, and recreated the txout_detail view.
I'm sure this solution is dangerous if someone manages to stuff much larger blocks into a block chain, but I do not know a reasonable limit for this column yet.
Thanks for the report. It's too bad that junk got into the Namecoin blockchain. Do you have the actual script length?
http://explorer.dot-bit.org/tx/1474553 shows the transaction size as 32767, and the long script would be most of that, but that explorer may have truncated it. You can verify this with something like:
SELECT MAX(LENGTH(txout_scriptPubKey)) FROM txout JOIN tx USING (tx_id) WHERE tx_hash = '0bb558f73a543f2631acbd8c5614d3ed2171eb710a586b4485b8303d4a4a0b61';
I'll consider simply increasing the column width, but that has the side effect of making MySQL create the column as type TEXT rather than VARCHAR (unless using binary-type=binary). This may not be so bad. The column does not take part in any joins, and the vanilla app never searches it. Anyone?