Bug overview description.
The comments listed when using the "» Search for myself in comments" function include those mentioning users whose usernames include the character sequence of my username (not case sensitive) (ex. searching for my username (ForThePlot) also returns comments mentioning another user, Justherefortheplot)

What part(s) of the site page(s) are affected?
Affects the "» Search for myself in comments" link on the "My Account" page

What is the expected behavior?
Expected behavior: return only comments mentioning exactly my username, usually in a blockquote reply

What actual behavior is given instead?
Actual behavior: return only comments containing the characters of my username without case sensitivity, including the usernames of certain other users

Can you reproduce the bug every time?
Yes

What steps did you take to replicate this bug?
To replicate: go to the page linked on https://e621.net/user/home as "» Search for myself in comments" (example)