[imp] trouble using IMP in "Mobile (Smartphone/Tablet) mode after upgrade to horde 5.2.0 and imp 6.2.0

[Patrick Wolf]

Greetings,

I ran the "pear upgrade -a -B horde/webmail" yesterday and then went 
through the "Gear" menu configuration to update the configs and SQL 
database.  Everything seems to be working in normal "Automatic" mode 
from a browser such as Chrome or Firefox.  But from an android device or 
any browser for that matter using the "Mobile (Smartphone/Tablet) mode 
we can't access mail.

When trying to open the "Mail" link on the interface the address bar 
changes from
https://ourservername/horde/services/portal/smartmobile.php to
https://ourservername/horde/services/portal/smartmobile.php#mailbox?mbox=SU5CT1g
but the browser appears to just reload the screen that shows up after 
login.  The user isn't actually taken to the mobile version of imp.

Has anyone else experienced this issue or know where I can look for a 
fix?  Maybe a configuration option didn't get upgraded properly when I 
went through the update process yesterday?

Thanks,

Pat