thanks for acting on it so quickly!

Small footnote - my startup says it's on 2.0.1 already. I assume the forthcoming version is 2.0.2 (or 2.0.1.1)

Raspbian Jessie on RPi, same situation. Maybe this portion of the log file will help:

20170423 14:04:24 [qtp22774030-17] ERROR com.ubooquity.d.b - Request processing failed for URI: /opds-comics/comics/1738/Spawn%20258%20%282015%29%20%28Digital-Empire%29.cbr (method:GET)
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
   at java.lang.String.substring(String.java:1967) ~[na:1.8.0_65]
   at com.ubooquity.provider.opds.c.d(SourceFile:203) ~[Ubooquity.jar:2.0.1]
   at com.ubooquity.provider.opds.c.a(SourceFile:165) ~[Ubooquity.jar:2.0.1]
   at com.ubooquity.d.c.a(SourceFile:138) ~[Ubooquity.jar:2.0.1]
   at com.ubooquity.d.b.handle(SourceFile:49) ~[Ubooquity.jar:2.0.1]
   at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1228) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:170) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1130) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:118) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.Server.handle(Server.java:564) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:318) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) [jetty-server-9.4.0.v20161208.jar.5803206714807878639.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279) [jetty-io-9.4.0.v20161208.jar.6998083119133886536.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:112) [jetty-io-9.4.0.v20161208.jar.6998083119133886536.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124) [jetty-io-9.4.0.v20161208.jar.6998083119133886536.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:122) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.strategy.ExecutingExecutionStrategy.invoke(ExecutingExecutionStrategy.java:58) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:201) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:133) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590) [jetty-util-9.4.0.v20161208.jar.7886098862656370308.tmp:9.4.0.v20161208]
   at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]
20170423 14:04:24 [qtp22774030-17] ERROR com.ubooquity.c.a - Request already handled: /opds-comics/comics/1738/Spawn%20258%20%282015%29%20%28Digital-Empire%29.cbr

that didn't work either. Not sure why...

In troubleshooting, however, I discovered a load of permissioning issues and corrupt CBZs with my comics folder - enough that I gave up troubleshooting and just rebuilt both Mylar and Ubooquity 2. It's still indexing, but so far the OPDS feed is populating nicely... I think you can close this as unresolved/suspected user issue or the UserEcho equivalent... thanks!

Yes, it's set to true.