Please provide us a sample track for evaluation.

What version of SC are you running?
What firmware version is on your Controller?

(1) I'm using SqueezeCenter 7.3 - 23377 (it's the same with older versions)

(2) Firmware version of Duet Receiver is 48

(3) Controller runs version 7.2 r2920

Created attachment 4094 [details]
shows appearence of SqueezeCenter with MPC file using ";" as separator

Created attachment 4095 [details]
sample track MPC using ";" as separator

Verified, when the attached file is the ONLY file in the library, as soon as I click PLAY via the controller, it will fall off the network or act badly.

Playing the track from the WEB UI, I get a repeating 4 second clip.

Verified on 7.3 & 7.2.1

the same file plays fine outside of SC.  

SB 2/3, BOOM, TP do not lock up when playing this track.  However the SC still does not properly transcode the MPC file all the time.

Tested:
AIFF / mppdec = FAIL
FLAC / mppdec/flac = PLAY
WAV / mppdec = FAIL

Please don't preset targets. Thanks.

Changing summary, was 'multiple items in tags doesn't work with MPC files'

Please retest with the latest nightly build, there were a bunch of transcoding fixes checked into the 7.3 branch

retestetd with: SqueezeCenter 7.3 - 23752, Controller 7.3 r3220, Receiver 52

-transcodes properly from beginning to the end
-controller no longer crashes when selecting MPC files
-the only remaining issue is display behavior. Two artists tagged with ";" as a separator still do not show up as two different library entries in Squeezecenter and Controller (have a look at the attachment)

Created attachment 4189 [details]
one entry for two artists

controller r3250 will cause the controller to lose sync with the receiver, may or may not recover.

My former post was wrong. I second that the controller is still losing sync (reboot necessary). 

The files are played correctly though. It is just not possible to access them on the controller through the menu level which contains the ";" (artists).

this isn't going to be fixed by 7.3. retarget for 7.3.1

Bruno - the separator in that file isn't a semicolon, but a character 0x00. Replacing it with a semicolon correctly splits the two artists.

with only these exceptions, my bug list is being retargetted for 8.0

for 7.3.2 (very soon):
https://bugs-archive.lyrion.org/show_bug.cgi?id=7186 Browse albums/artists/genres/  years should remember previous state 

for 7.3.3 (later, but before 8.0):
https://bugs-archive.lyrion.org/show_bug.cgi?id=7139 Add editable "Network Settings" page

https://bugs-archive.lyrion.org/show_bug.cgi?id=7502 Add setup mode to set Static IPs (even if DHCP is present)

https://bugs-archive.lyrion.org/show_bug.cgi?id=7829 Jive menu broken if BLOCK_SIZE == list count + 1 and "Pla...

https://bugs-archive.lyrion.org/show_bug.cgi?id=8878 Party Mode

https://bugs-archive.lyrion.org/show_bug.cgi?id=10064 SqueezeCenter doesn't always auto-generate playerstatus w... (which will fix 8300)

https://bugs-archive.lyrion.org/show_bug.cgi?id=6334 add applet for network diagnostics (currently assigned to Tom)

This bug should be fixed by Audio::Scan which handles APEv2 tags with null separators.

This bug has been marked as fixed in the 7.4.0 release version of SqueezeBox Server!
    * SqueezeCenter: 28672
    * Squeezebox 2 and 3: 130
    * Transporter: 80
    * Receiver: 65
    * Boom: 50
    * Controller: 7790
    * Radio: 7790  

Please see the Release Notes for all the details: http://wiki.slimdevices.com/index.php/Release_Notes

If you haven't already, please download and install the new version from http://www.logitechsqueezebox.com/support/download-squeezebox-server.html

If you are still experiencing this problem, feel free to reopen the bug with your new comments and we'll have another look.