Redmine

There are additional classes in the html code for issues, like the one for status. But the number is generated by position instead of id. I'd think intended behavior would be to generate those by id.

Steps for reproduction:
Add a theme/css with status color coding, e.g.:

/* use MantisBT style coloring by status */
table.issues tr.status-1 { background: #fcc; } /* new */
table.issues tr.status-2 { background: #cdf; } /* assigned / in progress */
table.issues tr.status-3 { background: #dfd; } /* resolved */
table.issues tr.status-4 { background: #fdf; } /* feedback */
table.issues tr.status-5 { background: #eee; } /* closed */
table.issues tr.status-6 { background: #fd6; } /* rejected */

Add a new ticket status and move it's position to No.1 - all colors would be mixed up.

Additional thoughts:
If this is intended (didn't find any documentation) it might be needed for some JavaScript sorting, however even in that case it would be better to have a more distinguished name or supply both (like status-1 and statusid-3 or something similar).