some search characters not handled well

[jdee]

Add a period to the end of a search, e.g. http://dubsar-dictionary.com?term=jurisprudence. That generates an unfriendly error. Other characters probably do the same.

[jdee]

This was caused by treating these things as regular expressions. That's only appropriate as an optimization when doing a case-insensitive match against a literal. Search terms that contain additional characters like the period and square brackets cannot take advantage of this optimization.