I tend to rely on the RSS feed heavily to find both new chapters and new series.

Unfortunately, many releases seem to slip past it without being put in the feed. Just as random examples, Judge (TONOGAI Yoshiki) and Dorohedoro have had releases in the past couple days that didn't update the list; I often only find these much later if I visit series pages on a whim.

Is it possible to tighten up the updates in the RSS feed to get more complete coverage of new releases?

How often is your RSS reader viewing the site? It may not be checking back often enough... which would make it miss releases.

Thanks for that, I've just found something I've never seen before.

I'm checking the XML, and apparently Safari's built-in RSS is just ignoring my "missing" updates entirely, even though they're there. I can't see any difference between the format of the displayed/missing elements, and no amount of refreshing or cache-clearing is fixing it. I may need to move to a dedicated feed reader.

So it looks like the problem is on my end. Thanks.

Found the problem. This may extend to other RSS readers, so you may want to take it into consideration.

RSS aggregators need to uniquely identify and separate duplicates to enable updating. RSS 2.0 uses the optional element to do this; in its absence, as in the mangaupdates feed, some aggregators fall back to the element, as mentioned [url=http://www.詹姆斯.com/blog/2006/08/rss-dup-detection]here[/url]. Safari is one of these, with the unintended result that the default "http://www.mangaupdates.com/releases.html" is wiping out any releases with that link after the first one in the feed, which is a majority of the total releases (22 out of 32 in the feed at this moment).

Would it be possible to add a unique element for the updates in the RSS? It would be more robust, and fix this problem for readers that expect each to be a unique identifier.

I came across the same thing while making an RSS reader here. And I can honestly say that a reader that only looks at the link to determine whether something is different is not very well made. (I too did it like that for a short while, but it was soon clear that it's a terribly bad method. This is not a "problem" that's especially rare, with feeds.)

While we're on the subject, though...
In the case where there is no valid DL link, it would be so much nicer if the link went to the group's home (or as a backup, forum) page instead of the Releases page. It would save quite a bit of pointless clicking for the user, and should save some useless serving of pages for the site.

Quote from akanagi

Thanks for that, I've just found something I've never seen before.

I'm checking the XML, and apparently Safari's built-in RSS is just ignoring my "missing" updates entirely, even though they're there. I can't see any difference between the format of the displayed/missing elements, and no amount of refreshing or cache-clearing is fixing it. I may need to move to a dedicated feed reader.

So it looks like the problem is on my end. Thanks.

Use google reader ^^

Reading Love LuckyRecommended B Gata H Kei <3 Conveni-N XD

So that's a no on the guid, then?