Copy the text below in a srt file and use it with any video file in JRiver and in MPC.
JRiver displays the subtitles extremely tiny and with a large space between the lines, while MPC displays them properly.
What's more, JRiver displays the first and second subtitle lines at the same time, while the line timestamps are not overlapping, and it should first display line 1, and later line 2.
Later edit: the first and second line are displayed at the right time, my mistake; it's the line spacing that's wrong
1
00:00:02,080 --> 00:00:07,070
<font face="Trebuchet MS" size="24"><i>This is the first line of text
to be displayed,</i></font>
2
00:00:07,070 --> 00:00:08,520
<font face="Trebuchet MS" size="24"><i>and this is the second line of text.</i></font>
3
00:00:14,590 --> 00:00:15,780
<font face="Trebuchet MS" size="24">Thank you for looking at this issue!</font>
4
00:00:31,450 --> 00:00:35,930
<font face="Trebuchet MS" size="24">All things considered, this is
something that should not look like this.</font>
5
00:00:36,800 --> 00:00:38,080
<font face="Trebuchet MS" size="24">MPC's internal subtitle renderer seems to handle this better.</font>