I've committed a fix to one of the marker menu bugs. Previously, the marker menu had been split to show markers in the <defs> above the line only if they were non-stock markers. However, the problem happens that if one alters the stock marker in the <defs> section without changing its ID, it doesn't show at all in the menu.
Now, the menu shows ALL markers from <defs> above the line, regardless of whether they're stock or not. This obviously has the downside that for people who use a lot of stock markers, the menu will get cluttered, however I suspect that may be a less common use case than we thought initially.
Also, a more important underlying change is that in order to do this I've added some svg preview cache code based on code used by the icon renderer. This allows us to render each marker preview once, instead of three times (once for each menu), and avoids performance trouble if the marker menu is dynamically changed.
(I needed to dynamically update the marker menus when selecting stock id's to ensure that if you select a stock id, it immediately shows up in the above-the-line markers in all three menus.) This will also eventually help solve a problem where if you have the fill-and-stroke dialog open when switching between two docs with custom markers, it doesn't update properly; I haven't fixed this, but just need to figure out how to hook in with the callback for "document selection changed".
(This dynamic marker menu underlying structure is also needed for future anticipated changes to the marker system...)
Bryce