Please capitalize where necessary: books and discussions can, at best, serve only as guides for the individual inward search.
A: Books and discussions can, at best, serve only as guides for the individual inward search.

Q: the same possibility also exists for most of the other eu-15 countries.

A: The same possibility also exists for most of the other EU-15 countries.

Q: it is a replacement for built-in autosave feature, however autosavexl doesn't ask for confirmation and creates any number of backup files not spoiling an original version.
A: It is a replacement for built-in autosave feature, however AutoSaveXL doesn't ask for confirmation and creates any number of backup files not spoiling an original version.

Problem: everywhere in the old world and all along to recent times it was quite normal, that groups of people with different languages, religions, and cultures, were ruled by a foreign grand sovereign.
Can you repeat this sentence, but capitalize it?
Answer: Everywhere in the old world and all along to recent times it was quite normal, that groups of people with different languages, religions, and cultures, were ruled by a foreign grand sovereign.

Text: as best i can tell you can recreate the problem by deactivating the plugin and dropping the tables from the database with wp-dbmanager plugin ( i do this when i no longer use a plugin).

Correct capitalization: As best I can tell you can recreate the problem by deactivating the plugin and dropping the tables from the database with wp-dbmanager plugin ( i do this when i no longer use a plugin).

Problem: tariana turia politician in poll - public opinion online
Can you repeat this sentence, but capitalize it?
Answer:
Tariana Turia politician in poll - public opinion online