Quoting James Adcock <jimad@msn.com>:
Combining diacriticals are not well supported among user agents, especially the less capable ones like the Kindle.
Not sure a Kindle even knows what a combining diacritical is. However, they hose many more "capable" products too. Haven't seen any product anywhere which supports them well. Do you know of one?
The Kindle Previewer handles them reasonably well (But then that may rely on OS services, and not be a feature of the Kindle itself). Note that combining diacritics are essential in some scripts (dotted Hebrew, all Indic scripts), and in those scripts, if supported, they do work. Unfortunately, combining diacritics are only something of an afterthought with Latin script, and depends on some information being available in fonts and tools, but the situation is improving, and I no longer hesitate to put combining diacritics into PG texts. BTW, leaving them out is not an option, as they are in the source, and serve a purpose there. (The older Tagalog books I've worked on used a g with tilde; of course modern Tagalog no longer uses that, but removing it would require me updating the entire spelling, which is a considerable investment in time -- distributed antiquated spelling revision anybody? I've done it for one Dutch in old orthography book, and it took me weeks, including writing tools, and reading through the entire work to catch further remnants of old spelling. English speakers probably don't realize the benefits of not having changed their orthography for several centuries...) Jeroen.