mysql error: "Too many tables; MySQL can only use 61 tables in a join query". Bundle logic fail?

I'm occasionally seeing this MySQL error in watchdog. The site is quite busy and has lots of modules and css/js files. I was surprised not to find any other issues about this. Is this something unique to my configuration, or could advagg have a bug with it's bundling system?

User warning: Too many tables; MySQL can only use 61 tables in a join query: SELECT root.bundle_md5 FROM advagg_bundles AS root INNER JOIN advagg_bundles AS a USING(bundle_md5) INNER JOIN advagg_bundles AS b USING(bundle_md5) INNER JOIN advagg_bundles AS c USING(bundle_md5) INNER JOIN advagg_bundles AS d USING(bundle_md5) INNER JOIN advagg_bundles AS e USING(bundle_md5) INNER JOIN advagg_bundles AS f USING(bundle_md5) INNER JOIN advagg_bundles AS g USING(bundle_md5) INNER JOIN advagg_bundles AS h USING(bundle_md5) INNER JOIN advagg_bundles AS i USING(bundle_md5) INNER JOIN advagg_bundles AS j USING(bundle_md5) INNER JOIN advagg_bundles AS ba USING(bundle_md5) INNER JOIN advagg_bundles AS bb USING(bundle_md5) INNER JOIN advagg_bundles AS bc USING(bundle_md5) INNER JOIN advagg_bundles AS bd USING(bundle_md5) INNER JOIN advagg_bundles AS be USING(bundle_md5) INNER JOIN advagg_bundles AS bf USING(bundle_md5) INNER JOIN advagg_bundles AS bg USING(bundle_md5) INNER JOIN advagg_bundles AS bh USING(bundle_md5) INNER JOIN advagg_bundles AS bi USING(bundle_md5) INNER JOIN advagg_bundles AS bj USING(bundle_md5) INNER JOIN advagg_bundles AS ca USING(bundle_md5) INNER JOIN advagg_bundles AS cb USING(bundle_md5) INNER JOIN advagg_bundles AS cc USING(bundle_md5) INNER JOIN advagg_bundles AS cd USING(bundle_md5) INNER JOIN advagg_bundles AS ce USING(bundle_md5) INNER JOIN advagg_bundles AS cf USING(bundle_md5) INNER JOIN advagg_bundles AS cg USING(bundle_md5) INNER JOIN advagg_bundles AS ch USING(bundle_md5) INNER JOIN advagg_bundles AS ci USING(bundle_md5) INNER JOIN advagg_bundles AS cj USING(bundle_md5) INNER JOIN advagg_bundles AS da USING(bundle_md5) INNER JOIN advagg_bundles AS db USING(bundle_md5) INNER JOIN advagg_bundles AS dc USING(bundle_md5) INNER JOIN advagg_bundles AS dd USING(bundle_md5) INNER JOIN advagg_bundles AS de USING(bundle_md5) INNER JOIN advagg_bundles AS df USING(bundle_md5) INNER JOIN advagg_bundles AS dg USING(bundle_md5) INNER JOIN advagg_bundles AS dh USING(bundle_md5) INNER JOIN advagg_bundles AS di USING(bundle_md5) INNER JOIN advagg_bundles AS dj USING(bundle_md5) INNER JOIN advagg_bundles AS ea USING(bundle_md5) INNER JOIN advagg_bundles AS eb USING(bundle_md5) INNER JOIN advagg_bundles AS ec USING(bundle_md5) INNER JOIN advagg_bundles AS ed USING(bundle_md5) INNER JOIN advagg_bundles AS ee USING(bundle_md5) INNER JOIN advagg_bundles AS ef USING(bundle_md5) INNER JOIN advagg_bundles AS eg USING(bundle_md5) INNER JOIN advagg_bundles AS eh USING(bundle_md5) INNER JOIN advagg_bundles AS ei USING(bundle_md5) INNER JOIN advagg_bundles AS ej USING(bundle_md5) INNER JOIN advagg_bundles AS fa USING(bundle_md5) INNER JOIN advagg_bundles AS fb USING(bundle_md5) INNER JOIN advagg_bundles AS fc USING(bundle_md5) INNER JOIN advagg_bundles AS fd USING(bundle_md5) INNER JOIN advagg_bundles AS fe USING(bundle_md5) INNER JOIN advagg_bundles AS ff USING(bundle_md5) INNER JOIN advagg_bundles AS fg USING(bundle_md5) INNER JOIN advagg_bundles AS fh USING(bundle_md5) INNER JOIN advagg_bundles AS fi USING(bundle_md5) INNER JOIN advagg_bundles AS fj USING(bundle_md5) INNER JOIN advagg_bundles AS ga USING(bundle_md5) WHERE a.filename_md5 = '4268f91bd0de04dd8d9d2ff4282259d9' AND b.filename_md5 = '52ae9b20d07a214cf2b5eb3bbd675899' AND c.filename_md5 = '1ac1d22e9a084703fc1dac0cb9e186fe' AND d.filename_md5 = 'ec5c656b7a90cc61367b5b8b519725f9' AND e.filename_md5 = 'c38afabbbf41bb6dd0dc0d334cf6b8fc' AND f.filename_md5 = 'ac5a3f4f431b52771272f754a63c9ec0' AND g.filename_md5 = 'ac5f09ee40718d1aabdfbe52962df12b' AND h.filename_md5 = '817daedd521a2669b0a1733984d3ab8d' AND i.filename_md5 = 'c9f71b6c745c219a20de18eba608451e' AND j.filename_md5 = '508c9894297367123d7d5a79cd3a97c6' AND ba.filename_md5 = '4dbcb1a7396d39baf0d4e076899d6679' AND bb.filename_md5 = 'f63549055f2b98030719d2d465bede95' AND bc.filename_md5 = 'aa038ab71f8d02ae5fb0d380a02728b8' AND bd.filename_md5 = '9f580c525a51542a3d2c4bd8c50c13cf' AND be.filename_md5 = '793e6a6051d1d7b46d021e24cfc23535' AND bf.filename_md5 = 'cd0edd3427384c4596bf66222e2a3fcd' AND bg.filename_md5 = '625127f09813ceeb67433b9f28d6e0a0' AND bh.filename_md5 = '2af39980e2683d1713c5a24cca4ae792' AND bi.filename_md5 = '7a9ac398e893b0412528bc2fee5d2832' AND bj.filename_md5 = '1a5ab7a50c32345a18dfede5d6c0e82f' AND ca.filename_md5 = 'd4cf2288107eb4654aad629126577ce6' AND cb.filename_md5 = '566032e03490a0a0538d666095a524fe' AND cc.filename_md5 = 'abf224eaae77613eec9992e72e598de4' AND cd.filename_md5 = 'b10fed42674e308b49caedf90610a435' AND ce.filename_md5 = 'c2432d4d708a615422496d883b5fac6b' AND cf.filename_md5 = '1c19a98b559fa884c75a05f025e15127' AND cg.filename_md5 = 'feef6f119e27694bd93250d438369a36' AND ch.filename_md5 = 'ac3d999899d9e5375a326c769bb144be' AND ci.filename_md5 = '844a6a259c032a5d3ba58d7147bf644a' AND cj.filename_md5 = '0e44544c31ddfab2935a44b7b0d4cf66' AND da.filename_md5 = '15d690fa9eb2f948e86c5cea9f5d5de2' AND db.filename_md5 = 'b2afc8ae0d05f72af1ad134bcc9eb189' AND dc.filename_md5 = 'f1ece9aca82de5d9f8c11befda78ca59' AND dd.filename_md5 = '61a684203b64e8342683afc4852d5411' AND de.filename_md5 = 'a7dcc182ef8f4fd9d1f9f19cc11af3cf' AND df.filename_md5 = '87987aa274bf2c7c75be5dd8f54f91ab' AND dg.filename_md5 = '540da21e27afc568598a32d08e02b216' AND dh.filename_md5 = '239d9a0759184090c117b9d1faac5fd2' AND di.filename_md5 = '430c122a5ac0cb5a39f4a43c36bb7cd9' AND dj.filename_md5 = '14ed8838f4c8ac54325c8774c6bb80ec' AND ea.filename_md5 = '44e9146e0b202ba6ef3e2e049879473c' AND eb.filename_md5 = 'cf0e5df1ce64119cffc3f94519600245' AND ec.filename_md5 = '0ea4864bd5e40421686ccc112a1e977c' AND ed.filename_md5 = 'a3163f2de4d68bc2f2ab493dd2d6e07e' AND ee.filename_md5 = '84631cbe6ec36d3cb407fae242f5bed9' AND ef.filename_md5 = '44bc1aaf5cab393c76226c61e731ffe1' AND eg.filename_md5 = '1c3511b933524d47f0ec52dda5da5448' AND eh.filename_md5 = 'e7af70c6bc592161830f5361e17852ec' AND ei.filename_md5 = '5197ccd7910d6bd79142874a18ae3ca7' AND ej.filename_md5 = '529fb0176151434d84b1223decdc7af2' AND fa.filename_md5 = '8db6dcad21f8c83dcf6ccaf0f9583def' AND fb.filename_md5 = '8060f833924ec2b33be1f3ead1d81715' AND fc.filename_md5 = 'a7ad88724ad359dfe8ae510602f57c5f' AND fd.filename_md5 = 'a8e052561dd333e3e17c067aea2cb6dd' AND fe.filename_md5 = '3c54c5f6eb6edc3bb1e7481a4c6d12b7' AND ff.filename_md5 = '19b52b24e89c8212f4f14302eb066356' AND fg.filename_md5 = '8348bd06eb56b2ecfab0b1a57bcbfdf3' AND fh.filename_md5 = '6c7f6b1db1f68653ee8d01c5055ffe8f' AND fi.filename_md5 = '199e55ed200c842c941b61242109ca41' AND fj.filename_md5 = 'f88cec77e54915077d9ace48adaf184e' AND ga.filename_md5 = '7755a6b00f0d3ad3471c05d818d15568' GROUP BY bundle_md5 in _db_query() (line 148 of /var/www/live.mysite.com/web/includes/database.mysql.inc).